**PUBLICATIONS
and PREPRINTS **

Growth of homology torsion in amenable groups, with N. Nikolov and P.H. Kropholler, 2015.

Ping Pong on CAT(0) cube complexes, with M. Sageev, preprint 2015.

Rigidity of Almost Isometric Covers, with J-F Lafont and B. Schmidt,

*Indiana J. Math*, 2015.A non-LEA Sofic group, with N Nikolov, 2014.

On Deficiency Gradients of Groups, with N. Nikolov,

*IMRN*, 2015.Rank gradient and cost for Artin groups and their relatives, with N. Nikolov,

*Groups Geometry and Dynamics*2014.One relator quotients of Graph Products, with Yago Antolin,

*International Journal of Algebra and Computation*, 23 (1) 2013.A topological splitting theorem for Poincare duality groups and high dimensional manifolds, with G.A. Niblo,

*Geometry and Topology*(17) 2013.Some non-amenable groups, with G. A.. Niblo,

*Publicacions Matematiques*56(1) 2012.Relative ends, L2 Invariants and Property (T), with G.A. Niblo,

*J. Algebra*(33) 2011.Asymptotically CAT(0) Groups,

*Publicacions Matematiques*55(1) 2011.On Property (FA) for wreath products, with Y Cornulier,

*J. of Group Theory*14(1) 2011.Discrete Groups and CAT(0) Asymptotic Cones, Doctoral dissertation from The Ohio State University, December 2008; Adviser: Indira Chatterji.

**Expository
Work**

For notes from the Advanced Class in Algebra, follows links from my homepage.

Weyl's Equidistribution Theorem, Resonance, Volume 8, Number 5, May 2003.

My articles for the National Cipher Challenge 2010: