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TWISTER NEWSLETTER
No’s 1 – 25=
CONTENTS
Twister Descri= ption of Low-Lying Baryon States (L Hughston)= ........................................................... 1
The Twisted Ph= oton (R Ward)...............................= ......................................................................... <= /span>7
Zero-Rest-Mass= Fields from Twister Functions (R Ward).....= .............................................................. 9
The Twister Qu= adrille (G A JSparling et.al.)..............................................................= ...................... 10
The Non-Linear Graviton Representing the Analogue of Schwazschild or Kerr Black Holes (GAJ= S)....... 14
Local Metric Properties of H-Space (RH et.al.)...= ...........................................................................= . 18
The Universal = Bracket Factor (R Penrose)..................= .................................................................... 20
Some Elementary Twistor Integrals with Boundary (R Penrose)....................................................... 21
Projected Lapt= on Cube (R Penrose et.al.)..................= .................................................................... 21
The Snail Cont= our (R Penrose et.al.).....................= ........................................................................ = span>22
No contents pa= ge
No
3: 7 DECEMBER 1976
A Finate Cover= ing for PT (R Penrose)......................= .......................................................... Front page
Replacing the = Snail Contour by a Branched Contour (R Ward)Twistors and M= ultiple Moments (G Curtis)..................= .................................................................... 1
H-Space – a New Approach (M.Ko et.al.)..............= .......................................................................... = 5
Global Propert= ies of Massless Free Fields (D Lerner).....= ................................................................... = 7
Evaluation of = Strand Networks (J Moussouris).............= .................................................................... 9
The Back-Hande= d Photon etc (R Penrose......................= ................................................................ 12<= /p>
TN2 Errata..........................................= ...........................................................................= ............ 17
A Generalised = Photon Construction (L Hughston)...........= ................................................................ 18<= /p>
2-Twister Func= tions for Potentials (N Fell).............= ........................................................................ = span>22
Cohomology is = Really Needed! (A Hodges).................................................................= .................... 1
The Twisted Ca= mel (R Penrose)............................= .......................................................................... = 3
Twister Constr= uction for Left-Handed Gauge Fields (R Ward)........................................................... 4
A Review of Hypersurface Twistors (R Ward.......= ...........................................................................= . 6
The Integrated= Product of Six Massless Fields (A Hodges)...= .............................................................. 8
More on the Un= iversal Bracket Factor (A Hodges)...........= ................................................................ 9= p>
Linearized Schwarzschild in a 2-Twistor Formalism (N Fell)............................................................. = span>10
The Non-Analyt= ic Version of Kerr’s Theorem (D Lerner)= .................................................................. 1= 1
The Twister Co= homology of Local Hertz Potentials (L Hughston)Spin Networks = and the Vector Coupling Coefficients (J Moussouris)................................................ 17
More on the Tw= isted Camel (R Penrose)...................= ...................................................................... 1
Potentials for Spinning Particles (N Fell).........= ...........................................................................= ...... 2
Crossing and T= wistor Diagrams (A Hodges).................= .................................................................... 4
Remarks concer= ning the Ambidextrous Photon (R Penrose).....= ......................................................... 7
Massless Field= s and Sheaf Cohomology (R Penrose)........= ................................................................. 9<= /p>
Sheaf Homology= & Contour Integrals (R Jozsa).........= ..................................................................... 14
The ‘Inverse T= wistor Function’ for Postive Freq. Feilds (D Lerner).................................................... 17
The ‘Skeleton’ Twistor Functor for a Stationary Em. Field (G Curtis)..........................................= ....... 19
Cohomological Integration on Pn (L Hughston)......= ....................................................................... 21
TN1 erratum
The Grgin-Masl= ov Index (N Woodhouse).......................= ................................................................. 1<= /p>
Baryon Magnetic Moments (L Hughston & M Sheppard).................................................................. = 3
An Example of = an H-Space (K Tod).....................= ...........................................................................= .. 7
Plebanski-isin= g the Self-dual Y-M Equations (K Tod).....= .................................................................... 8
Integrals for = Strand Networks (S Huggett)................= ....................................................................... 9
A 2-Twistor Fu= nction for the EM Dipole (N Fell)..........= ................................................................... = 12
Sheaf Cohomolo= gy and an Inverse Twistor Function (R Ward)= ........................................................ 13
Complex pp-wav= es (W Curtis, D Lerner & F Miller)....= ..................................................................... 16
Note on the n-= twistor Internal Symmetry Group (R Penrose & G Sparling)........................................ 19
Local H1<= /sup>’s and Propagation (R Penrose).........= ...........................................................................= ...... 1
Some Cohomolog= ical Nonsense applicable to Twistor Theory (M Eastwood)..................................... 6
Zero-rest-mass= Fields and Topology (M Eastwood)...........= ............................................................. 11
Further Remark= s on Massless Fields and Cohomology (L Hughston)................................................. 12
Compton Scatte= ring for Massless Electrons (A Hodges).......= ........................................................... 14
Cohomological = Wave Functions (A Hodges)................= .................................................................. 1= 8
Blowing up the= Box (S Huggett)............................= ........................................................................ = span>19
The Good Cut E= quation for Maxwell Fields (E Newman).......= .......................................................... 21
Cell Decomposi= tion and Homology of Minkowski Space (R Moore)................................................. 23
In Search of t= he Ninth Vector Meson (Tsou S.T. & L Houghston)..................................................... 26
Spin-Statistic= s and Twistor Theory (M Ginsberg).........= ................................................................... = 27
Sheaf Cohomolo= gy and Twistor Diagrams (M Ginsberg & S Huggett)............................................... 32
Supertwistors = (G Burnett-Stuart).....................= ...........................................................................= .... 1
More on Extend= ed Reggee Trajectories (Tsou Sheung Tsun)The Non-Analyt= ic Hypersurface Twistor Construction (D LeBrun)...................................................... 6
Picturing Intr= insic Properties of Particles (Z Perjés)..........................................= ............................... 10
Partial Wave Amplitudes in Twistor Theory (M Sheppard)............................................................... 16
A Cohomologica= l Scalar Product Construction (M Ginsberg)...= ........................................................ 20
Matrix Element= s for Baryon Semi-Leptonic Processes (A Popovich)................................................. 26
A Googly Gravition? (R Penrose)= ...........................................................................= ........................ 32
Twistors as He= licity Raising Operators (R Penrose)...............= .......................................................... 35
On Raising and Lowering Helicity (M Eastwood)......= ...................................................................... 37
The Twistor QQ= QQ meson Spectrum (L Hughston & Tsou S T)= ......................................................... 39
Massless Field= s Based on a Line: Explosion and Annihilat= ion (M Eastwood & L Hughston)..........= ....... 43
Massless Field= s Based on the Twisted Cubic: Detonation and Extermination (M Eastwood,
L Hughston & T Hurd)..........................................= ................................................................... = 48
The Good Cut E= quation Revisited (K Tod)...................= ..................................................................... 1
Sparling-Tod M= etric =3D Eguchi-Hanson (G Burnett-Stuart)....= .............................................................. 6
Remarks
on the Sparling and Eguchi-Hanson (Googly?) Gravitons (R Penrose)
The Twistor Tr= ansform and Propagators (M Eastwood & M Ginsberg)............................................. 14
The Anti-self-=
dual
Coulomb Field’s Non-Hausdorff Twistor Space (G Sparling & R Penrose)
Self-dual Coul= omb Field and the Geometry of Quadrics in P3 (R Moorre)..........................................= 19
Some Remarks o= n Grand Unified Theories (L Hughston & T Hurd).................................................... 26
Deformation Th= eory & Geometry: Null Geodesics and Conformal Structure (C LeBrun)..................... 28
Connecting the Gravitons (M Ginsberg...............= ..................................................................... 33 1/2
Zero Rest Mass= Fields and Boundary Contours (M Ginsberg)..= ......................................................... 34
Advertisement = for Advances in Twistor Theory..........= .................................................................... 38
More on the Sp= ace of Complex Null Geodesics: The Eccent= ric Case of Three Dimensions (C Le Brun)= 39
A Novel Pictur= e of the Twistorial CR Structures (C LeBrun).= ............................................................. 43
Twistorial CR Structures and Initial Data (C LeBrun)Cohomological = Residues (S Huggett).........................= ................................................................... = 49
Notes on Defor= mations of Albebraic Subvarieties of Twistor Space (L Hughston & G Séguin)............. 52
Ambitwistors (M Eastwood)...........................= ...........................................................................= ... 55
Non-Hausdorff Manifolds (N Woodhouse).............= ....................................................................... 59
The Wave Equat= ion in Even Dimensions (L Hughston).............= ........................................................ 60
Twisted Crossw= ord (Anonymous).........................= ........................................................................ = span>62
Mass, Cohomolo= gy and Spin (L Hughston & R Hurd)......= ................................................................... = 1
Moduli for som= e Vector Bundles on P3 (R Moore)..= .......................................................................... = 5
A Generalized = DeRham Sequence (N Buchdahl)...............= ............................................................... 11= p>
On the Evaluat= ion of Twistor Cohomology Classes (R Penrose)The Spin-Squar= ed Operators and Su(n) Casimir Operators for an n-p= oint system (A Popovich)............ 16
On Non-Project= ive Twistor Cohomology (M Eastwood).....= ............................................................ 17
Three Channels= for the Box Diagram (S Huggett & R Penrose)......................................................... 18
More on the Ev= aluation of Twistor Cohomology Classes (R Penrose).............................................. 22
A Sequence for Twistorians (Puzzle) (R Penrose)....= ........................................................................ = span>22
Some Expositor= y Notes on Affine Bundles and Googley Photons (P Green)...................................... 23
Spaces of Tors= ion-Free Null Geodesics: Dimensions above Three (C LeBrun).................................... 24
Spaces of Tors= ion-Free Null Geodesics: Heaven with a Cosmological Constant (C LeBrun)................ 26
Deformations o=
f PT-P1
(G Séguin)..........................................=
....................................................... 27
Concerning a F= ourier Contour Integral (R Penrose)........= .................................................................. 1=
Note of the ɸ4 Equation (N
Buchdahl)...........................=
................................................................. 2<=
/p>
Axisymmetric S= tationary Fields (R Ward).....................= .................................................................... 3
A New Year’s Resolution (S Huggett)..............= ...........................................................................= ..... 5
The inverse Tw= istor Function Revisited (N Buchdahl).....= ................................................................... = 6
Massive Partic= le States and n-Point Massless Fields (L Hughston & T Hurd)...................................... 13
Twistor Diagra= ms and Relative Cohomology (M Ginsberg)....= .......................................................... 17
Extracting Eig= envalues from Homogeneous Twistor Function (M Sheppard)..................................... 20
Non-Projective Propagators (M Ginsberg)............= ......................................................................... <= /span>25
Helicity Raisi= ng Operators and Conformal Supersymmetry (L Hughston & T Hurd)............................. 29
A New Angle on= the Googly Graviton (R Penrose).........= ................................................................. 31=
The Googly Map= s for the Eguchi-Hanson/Sparling-Tod Graviton (P Law).......................................... 36
Some More Elem= entary Twistor Integrals with Boundary (A Hodges)............................................... 39
On the Geometr= y of the Inverse Twistor Transform:
The Wave Equat= ion Transfigured (C R Lebrun)...........= ...................................................................... 1
Twistors for Cosmological Models (R Penrose).= ...........................................................................= .... 5
Extended Regge Trajectories Updated (Tsou= S T)................................= ............................................. 9
Antitwistor Functions (R Jozsa)................................................................= ..................................... 12
Extensions of = Massless Fields into CP5 (L P Hughston and T = R Hurd).........= ........................................ 15
Conformal Weig= ht and Spin Bundles (L P Hughston and T R Hurd).........= ........................................... 18
Metrics as
Metrics as
Some Remarks o= n Non-Abelian Sheaf Cohomology = (M G Eastwood)...........................= .................... 29
Recent Progres= s in Twistor Diagrams (A P Hodges).................................................................= ....... 30
Physical Left-= Right Symmetry and Googlies (R Penrose)...= .............................................................. 40
A Theory of 2-= Surface (“Superficial”) Twistors (R Penrose)..........................................= ..................... 2
Codeformations? (M L Ginsberg)...........................= ......................................................................... <= /span>6
Ambitwistors and the Klein-Gordon Equation in Curved Space-time (C R LeBrun).............................. 11= p>
Note on the Wa= ve Equation (N P Buchdahl).................................................................= ................. 13
Coupled Propag= ators (M L Ginsberg).........................= ................................................................... = 14
Twistors versus Antitwistors (M G Eastwood)..........................................= ...................................... 16
The Kinematic = Sequence (Revisited) (L P Hughston & T R Hurd).........= .............................................. 18
Cohomology of Line Bundles on Klein Quadric (R R Moore)............................................................ 20
The Conformal = Group Action on R1(C H) (V Soucek)..........................................= .............................. 22
Maxwell’s Equa= tions from Topology (Tsou S T).................................................................= ............. 26
The Status of = Affine Bundles in Twistor Theory (P Jones)..........................................= ...................... 28
A New Approach=
to Bose
and Fermi Statistics (L P Hughston & T R Hurd).........=
................................ 31
The Geometry o= f the Ward Construction (A Helfer).................................................................= ....... 35
Abstracts..........................................= ...........................................................................= .............. 37
On the Geometr= y of Googly Maps (P Law and R Penrose)...= .............................................................. 2
Two-Surface Twistors, Angular Momentum Flux and Multipoles
of
the Einstein-Maxwell Fields at Ø= span>+ (W T Shaw)....................= .............................................................. 4
Twistor Functions for Sources
1. Relative Cohomology and Sources on a Line I (T N Bailey).............................= ............................... 9
2. Real-Space Toplogy for Advanced/Retarded Twistor Functions (R Penrose).................................. 16
3. Relative Cohomology and Sources on Worldlines II (T N Bailey).................................................. 19
4. Twistor Blisters and Relative Co= homology (R Penrose).........................= ...................................... 22
Deriving the Sourceless Maxwell Equations the Hard Way (= Tsou S T).....= .......................................... 24
“Minitwistors” (P E Jones)................................................................= ........................................... 25
The Penrose Transform Without C= ohomology (M G Eastwood)......................= ................................ 28
Three Cohomological Channels for ɸ4 Scattering (M L Ginsberg)..........................................= ........... 29
Some Thoughts on MØller Scattering (M L Ginsberg).................................................................= ..... 32
Twistor Diagrams (A P Hodges).................................................................= ................................... 34
Some Comments on the Topology of Twistor Diagrams (M= G Eastwood)...........................= .............. 39
An Inductive Approach to Higher Dimensional Spinors (S B Petrack)= ................................................. 40
A Remarkable Connection Between the Wave Equation = and Spinors
In Higher Dimensions (L P Hughston)..........................................= .................................................. 46
Boundary Value Type and Initial Value Type Contour Integral
Formulas for Massless Fields (V Souček)....= ...........................................................................= ......... 50
A Manifestly Conformally Invariant Contour Integr= al Formula (A Helfer).......................................... 53
Addendum to TT NN 13.........................= ...........................................................................= ........... 55
Erratum for TT NN 12........................= ...........................................................................= ............... 55
Absracts......= ...........................................................................= .................................................... 56
Advertisement..........................................= ...........................................................................= ....... 59
Puzzle..........................................= ...........................................................................= ................... 59
A Scalar Product for Twistors Based on a Spacelike Hypersurface
Of Zero Extrinsic Curvature (N Ross)...= ...........................................................................= ............... 60
General-Relativistic Kinematics?? (R Penrose)..........................................= ....................................... 2
Solutions to Problems.........................= ...........................................................................= ............... 7
Spinors, ZRM Fields and Twistors= at Spacelike Infinity (W T Shaw)..........................................= ........... 8
The Manifold of Pure Spinors is a Homogeneous Space= (S B Petrack)......= ......................................... 11
Curved Space Twistors and GHP (B = Jeffryes)..........................................= ........................................ 12
Integral
Formulae for □ɸ=3D0
(R S Ward)..........................=
............................................................... 16=
p>
The
“’Normal’ Situation” for Superficial Twistors (=
M G
Eastwood)...........................=
....................... 18 Superstructure
versus Formal Neighbourhoods (M G Eastwood)..................................................... 19 Minitwistors and “Anti-Self-Dual” Monopoles (P E Jone=
s)..........................................=
..................... 20 A
New Approach to Quantum Gravity (L P Hughston)<=
span
style=3D'mso-tab-count:1 dotted'>..........................................=
...........................
Style Steet...= ...........................................................................= .................................................... 25
Twistor Theory and Harmonic Maps from Riemann Surface= s (M G Eastwood)...........................= ....... 26
More Twistor Functions for Sourced Fields (T N Baile= y)..........................................= ........................ 31
Manifestly Conformally Invariant Inverse Twistor Functions (A D Helfer)......................................... 34
Abstracts..........................................= ...........................................................................= .............. 36
Cosmological Models in P5 (T R Hurd)..........................................= ................................................... 2
A Note on Sparling’s 3-Form (R Penrose)....= ...........................................................................= ......... 6
Remarks on Curved-Space Twistor Theory and Googlies (R Penrose)............................= ..................... 7
“Maximal” Twistors & Local and Quasi-Local Quantities= (W T Shaw)...............................= ................ 11
An Alternative Interpretation of Some Non-Linear Gravitons (P E Jones)..........................................= 14
On the Density of Elementary States (M G Eastwood & A Pilator)..........................................= .......... 17
The Norm on Superficial Twistor Space (B P Jeffryes).....= ................................................................ 23<= /p>
Conformal Killing Vectors and Reduced Twistor Spaces (P E Jones)..............................= .................... 28
The Penrose Transform for Homogeneous Bundles (M G Eastwood)............................................... 34
A Prosaic Approach to Googlies (A D Helfer)..........................................= ........................................ 35
On Closed-Set Coverings for (R Penr= ose)..........................................= .......................................... 39
Remarks on Pure Spinors (A D Helfe= r)..........................................= ................................................. 40
Abstracts..........................................= ...........................................................................= . 16,27,33,40
New Ideas in Twistor Diagram Theory (A P Hodes)........= ................................................................. 41=
Formal Thickenings of Ambitwistors for Curved Space-Ti= me..........................................= ................... 2
Relative Cohomology, Googlies and Deformations of II (R Penrose)............................= ..................... 7
A Note on the Sparling 3-Form, or the Hamiltonian of G.R. (L Mason)..........................................= ..... 9
Twistors and Causal Relations in Minkowski Space (R Low).......................= ...................................... 12
Applications of the Geometry of SO(8) Sp= inors to Laplace’s
Equations in Six Dimensions (L P Hughston)..........................................= ......................................... 18
Higher Dimensions (R Ward).................= ...........................................................................= ............ 23
Cohomology of the Quadric and Homogeneous ZRM Fields = (P E Jones)..............................= ............. 24
Erratum..........................................= ...........................................................................= ................ 26
Extended Regge Trajectories and Bar= yoniums (Tsou S T)On Functional Integration (T R Hurd)..........................................= .................................................. 29
The Index of the 2-Twistor Equations (R Baston)..........................................= ................................. 31
Symplectic Geometry of Ø+ and 2-Surface Twistors= span> (W T Shaw)..........................= ............................ 33
Dual Two-Surface Twistor Space (B P Jeffryes)..........................................= .................................... 37
An Occurrence of Pell’s Equation in Twistor Theory= (K P Tod)..........= ................................................ 41
More on Googlies (A D Helfer).................................................................= .................................... 45
Abstracts..........................................= ...........................................................................= .... 26, 44, 48
More on Quasi-Local Mass (K P Tod).................................................................= ............................. 3
New Improved Quasi-Local Mass and the Schwarzschild Solution (R Penrose).................................... 7
On Bryant’s Condition for holomorphic curves in C R spaces (R Penrose)......................................... = 12
The Hill-Penrose-Sparling C R –folds (M G Eastwood)................................................................= ..... 16
Superambitwistors (M G Eastwood).................................................................= ............................. 16
Ambitwistors and Yang-Mills fields in Self-Dual Space= -times (C LeBrun)Is the Plebanski Viewpoint relevant to the Googly Problem? ( G Burnett-Stuart)............................... 23
Cohomological interpretation of f= (za) =3D zz log= zz (T Bailey).= ............................................................. 29
Colouring Donaldson’s Moduli Space (Tsou Sheung Tsun).........= ...................................................... 31
Entropy, Uncertainty and Nonlinearity (L P Hughston)..........................................= .......................... 33
Advertisement..........................................= ...........................................................................= ....... 32
Abstracts..........................................= ...........................................................................= .... 22, 39, 40
Objective state-vector reduction?(R Penrose)..........................................= ....................................... 1
Quasi local mass (N M J Woodhouse)........= ...........................................................................= .......... 5
Two-surface twistors for large surfaces (W Shaw)..........................................= ................................. 8
Two-surface twistors and killing vectors (B Jeffreys)..........................................= ............................ 13
An example of a two-surface twistor space with com= plex determinant (B Jeffreys).......................... 17
The twistor transform and conf= ormally invariant operators (M Singer)......= ...................................... 19
On Michael Murray’s twistor correspondence (M G Eastwood)...........................= ............................ 24
Formal neighbourhood, supermanifolds and relativised algebras (R Baston).................................... 25
Homogenous bundles and Le Brun’s “Einstein bundle”..........................................= ......................... 31
Differential geomentry in six dimensions (L P Hughston)..........................................= ....................... 32
Deforming ambitwistor space (L J Mason).................................................................= .................... 37
Abstracts..........................................= ...........................................................................= ....... 12 & 18
Embedding 2-surfaces in CM (R Penrose)........= ...........................................................................= ..... 2
Twistors and minimal surfaces (W Shaw)..........................................= .............................................. 4
A suggested and modification to the quasi-local formula (R Penrose)..........................................= ...... 7
Higher dimensional 2-surface Twistors (R Penrose)..........................................= ................................ 8
Asymptotically anti-de Sitter space-times (R Kelly)= ......................................................................... <= /span>11
H space from a different direction (C Kozameh and= E Newman).............................= ......................... 24
A theorem on null fields in 6-dimensions (L Hughston)..........................................= .......................... 27
A new proof of Robinsons theorem (L Hughston)..........................................= ................................. 29
A Twistor description of null S.D. Maxwell fields (M Eastwood)...........................= ............................ 31
The Penrose transform for Complex homogenous spaces (R Bas= ton & M Eastwood)...................= ..... 34
Conformally invariant differential operators on a spin bundle (M Eastwood).................= ................... 40
Conformally invariant differential operators for curv= ed space-time, (and note added by
R Glover) (R Ba= ston)..........................................= ...................................................................... 41
The Fefferman-Graham conformal invariant (M Eastwoo= d)..........................................= .................. 46
Deformations of A and vanishing Bach tensors (R Baston &= L Mason)..............................= ................ 47
Onn the topology of families of manifolds and the pul= lback mechanism (M Singer)................= .......... 48
Super Yang Mills (A Pilato)..............................................................= ............................................. 52
On a different approach to supermanifolds (A Pilato).......= .............................................................. 55
Quaternionic manifolds and the future tube (C LeBrun).......= ........................................................... 59
Complex quaternionic kahler manifolds (M Eastwood)..............= ..................................................... 63
A
note on backround coupled massless fields (A Helfer).......=
.......................................................... 65
An elementary model for quark confinement (L Hughston)..........................................= ................... 70
Geometry of null hypersurfaces (R Low).................................................................= ...................... 72
The structure and evolution of hypersurface Twistor spaces (L Mason)........................................... 75
Abstracts..........................................= ...........................................................................= ........ 54&62
Exponentiating a relative H2 (R Penrose)..........................................= ............................................... 2
Note on the geometry of googly mappings (P Law).....................................................................= .... 5
On a class of noon-Hausdorff manifolds and their <= span class=3DSpellE>cohomology (M Singer)........................................ 6
Local and global twistor descriptions; fields with so= urces on world-lines (M Singer)...........= ............... 12
Quasi-local correction (N Woodhouse)............= ...........................................................................= .. 17
2-surface twistors and hypersurface<= /span> twistors (R Penrose)............................................................... 18
2-surface pseudo twistors (B Jeffrye= s)..........................................= ................................................ 20
A six dimensional ‘Penrose diagram’ (B Jeffryes)<= span style=3D'mso-tab-count:1 dotted'>..........................................= .................................. 22
Minimal surfaces and strings in six dimensions (L Hughston & W Shaw).......................= .................... 25
Formal neighbourhoods for curvaed ambitwistor spaces (R Baston & L Mason)............................... 29<= /p>
On the topology of self-dual 4-manifolds (C LeBrun= )..........................................= ............................ 34
Self-dual curvatures and deformations (N Ross)= ...........................................................................= . 42
The Chern-Moser connection for hypersurface twistor C.R. manifolds (L Mason)............................. 49
A characterisation of twistor C.R. manifolds (L M= ason)..........................................= ........................ 56
The constraint and evolution equations for hypersurface twistor C.R. manifolds (L Mason)............... 58
Abstracts..........................................= ...........................................................................= ..... 17,33,41
Advertisement..........................................= ...........................................................................= ....... 41
Twistors and the Time-Irreversibility of State-Vector Reduction (R Penrose)...............= ....................... 1
Elemental States (A Hodges)...................= ...........................................................................= ............ 4
Local Cohomology, Elementary states & Evaluation = (R Baston).......= ................................................. 8
Stein Covers for Curved Twistor spaces (A Helfer).......= ................................................................... = 14
Anti-Self-Dual Deformations (R Baston).................................................................= ....................... 20
A.L.E. Gravitational Instantons and the Icosahedron (P= Kronheimer)...= ............................................ 22
The Kahler Structure of Asymptotic Twistor space (L Mason).....................= ..................................... 26
Dolbeault Representatives from C= harcteristic Initial Date at Null Infinity (L Mason).......................... 28
Towards an Ambitwistor Description of Gravity (J Isenbe= rg & P Yasskin).......................................... 32
The Twistor Realizatrion of Discrete Series (M Eastwood)........= ...................................................... 39
The Conformal Einstein equations (L Mason)Addendum to the Characterisation of Twistor C.R. Manifol= ds (L Mason)..............................= ............ 43
Remarks on Sommers’ Theorem. (L Hughston).....= ......................................................................... <= /span>44
Null Surfaces in Six and Eight Dimensions (L Hughston)..........................................= ......................... 49
Abstracts..........................................= ...........................................................................= .. 7,19,31.47
Advertisement..........................................= ...........................................................................= ....... 48
Local Twistor Transport at +: an Approach to the Googly (R Penrose)............................= ................... 1
The Complex Structure of Deformed Twistor Space (P = Law)..........................................= ................... 5
Cohomology on A and Obstructions (R Baston)..........................................= ..................................... 9
A New Programme for Twistor Diagram Theory (A Hod= ges)..........................................= .................. 11
Two Philosophies for Twistor Diagrams (S Huggett & M Singer)...................................................... 20= p>
Twistor Diagram ‘Magic’ and Coho= mology Algebra (R Baston)....................................................... 31=
Local Twistors and the Penrose Transform for Homogene= ous Bundles (L Mason)...................= .......... 36
The Relationship Between Spin-2 Fields, Linearized G= ravity and Linearized Conformal
Gravity (L Mason).................................................................= .................................................. 42
Twistor Quantization of Open Strings in Three Dimensi= ons (W Shaw)...............................= ............... 45
A
General Construction for Classical Strings in Eight Dimensional Space (L Hughston & W Shaw)....... 54
A Note on Real Null Curves in Minkowski Space (L = Houghston & W Shaw)........................................ 58
Abstracts..........................................= ...........................................................................= ..... 53,60,61
Advertisement..........................................= ...........................................................................= ....... 35
An approach to a coordinate-free calculus at II (R Penrose & V Thomas)..........................................= . 1
The Einstein bundle of a non-linear graviton (M Eastwood).............................................................. = span>3
Quantization of strings in 4-dimensions (L Hughston & W = Shaw)..........................................= ............. 5
Fattening complex manifolds (C LeBrun).................................................................= ...................... 13
On the weights of conformally invariant operators = (M Eastwood)...........................= ........................ 20
Tensor
products of Verma modules and
conformally invariant tensors (R Baston).......=
.................... 24
An algebraic form of the Penrose transform (R Baston)..........................................= ........................ 27
The isoperimetric inequality for black holes (K Tod= )..........................................= ............................. 29
A note on conserved vectorial quantities associat= ed with the Kerr Solution (L Hughston).................. 32
Examples of anti-self-dual metrics (C LeBrun)..........................................= ...................................... 37
Abstracts..........................................= ...........................................................................= . 28,31,36,42
Notice..........................................= ...........................................................................= .................. 36
On Qadir’s intertwining operators (R Penrose)..........................................= ...................................... 1
A twistor diagram for secord-order ɸ4 scattering= (A Hodges).............................= .............................. 3
Some twistor diagrams for closed-loop Feynman diagra= ms (A Hodges).............................= .............. 12
Inhomogeneity and crossing symmetry (A Hodges)....= .................................................................... 19
Cohomology and projective twisto= r diagrams (S Huggett & M Singer)..........................................= ... 33
Twistor functions for ‘infrared’ Maxwell fields (I Roulstone)....=
....................................................... 41
Further remarks on conserved vectorial quantities assoc= iated with the Kerr solution (L Hughston)..... 47
Twistor Cauchy-Reinmann m= anifolds associated to algebraically special space-times (L Mason)........ 50
Abstracts..........................................= ...........................................................................= ..... 32,46,49