Anna Seigal

I am a Hooke Research Fellow in the Mathematical Institute at the University of Oxford and a Junior Research Fellow at The Queen's College.

I received my PhD from UC Berkeley, where my advisor was Bernd Sturmfels. My thesis was awarded the SIAM Richard C. DiPrima Prize and the Friedman Memorial Prize.

My research interests lie in tensors and multilinear algebra, applied algebraic geometry and algebraic statistics.

Here is my CV. [last updated Apr 20]

Contact

Research Articles

Preprints:

The Maximum Likelihood Degree of Linear Spaces of Symmetric Matrices (with Carlos Améndola, Lukas Gustafsson, Kathlén Kohn, and Orlando Marigliano), arXiv:2012:00198.

Invariant Theory and Scaling Algorithms for Maximum Likelihood Estimation (with Carlos Améndola, Kathlén Kohn, and Philipp Reichenbach), arXiv:2003.13662. [Case study]

Publications:

Ranks and Singularities of Cubic Surfaces (with Eunice Sukarto), Le Matematiche 75 (2020) no. 2, 575-594. [arXiv]

Ranks and Symmetric Ranks of Cubic Surfaces, Journal of Symbolic Computation 101 (2020) 304-317. [arXiv]

Learning Paths from Signature Tensors (with Max Pfeffer and Bernd Sturmfels), SIAM Journal on Matrix Analysis and Applications 40 (2019) no. 2, 394-416. [arXiv] [code]

Tensor clustering with algebraic constraints gives interpretable groups of crosstalk mechanisms in breast cancer (with Mariano Beguerisse-Díaz, Birgit Schoeberl, Mario Niepel and Heather Harrington), Journal of the Royal Society Interface 16 (2019) no. 151, 20180661. [arXiv] [News story]

Duality of Graphical Models and Tensor Networks (with Elina Robeva), Information and Inference: A Journal of the IMA, iay009. [arXiv]

Mixtures and products in two graphical models (with Guido Montúfar), Journal of Algebraic Statistics 9 (2018) no. 1, 1-20. [arXiv]

Gram Determinants of Real Binary Tensors, Linear Algebra and its Applications 544 (2018) 350-369. [arXiv]

Real Rank Two Geometry (with Bernd Sturmfels), Journal of Algebra 484 (2017), 310-333. [arXiv]

Does Antibiotic Resistance Evolve in Hospitals? (with Portia Mira, Bernd Sturmfels and Miriam Barlow), Bulletin of Mathematical Biology 79 (2017) 191-208. [arXiv] [R package] [News story]

Singular Vectors of Orthogonally Decomposable Tensors (with Elina Robeva), Linear and Multilinear Algebra 65 (2017) no. 12, 2457-2471. [arXiv]

Eigenconfigurations of Tensors (with Hirotachi Abo and Bernd Sturmfels), Algebraic and Geometric Methods in Discrete Mathematics, Contemporary Mathematics 685, Amer. Math. Soc., Providence, RI (2017) 1-25.

Local dynamics of intersections: V. I. Arnold's theorem revisited (with Sergei Yakovenko) Israel Journal of Mathematics 201 (2014) no. 2 813-833. [arXiv]

Expository Writing and Outreach

Ideas for a complex world, a public lecture I gave as part of the Oxford Mathematical Institute public lecture series, Oxford, November 2020.

The Algebraic Statistics of an Oberwolfach Workshop, Snapshots of modern mathematics from Oberwolfach (2018) no. 1.

Applied Algebra and Geometry: A SIAGA of Seven Pictures, also featured as a series of three articles in SIAM news: I, II, III, Spring 2016.

Picture this Maths, a joint blog with Rachael Boyd to present mathematical research centered around pictures. Featured here in the AMS Blog on math blogs.

Iwasawa Theory of Elliptic Curves with Complex Multiplication, Part III essay (master's thesis) supervised by John Coates, Cambridge, Spring 2014.

Imagining things: What do you think about, when you think about maths?, a mini documentary about mathematical thinking, directed by Richard Braham and me, Cambridge, 2013.

Conferences

Upcoming:

Previous:

Activities

Michaelmas 2020: I organized, with Vidit Nanda, the Data Science seminar at the Mathematical Institute in Oxford.

Summer 2019: I organized, with Carlos Améndola, Joscha Diehl, and Francesco Galuppi, a mini-symposium at the SIAM Conference in Applied Algebraic Geometry, called "Signature tensors of paths".

Spring 2019: I organized a learning seminar on Applied Invariant Theory.

Summer 2018: I organized, with Elina Robeva, a mini-symposium at the SIAM Annual meeting "Theoretical Challenges of Tensor Decomposition".

Summer 2018: I organized, with Andre Uschmajew and Bart Vandereycken, a mini-symposium in the SIAM Conference in Applied Linear Algebra, called "Tensors and Multilinear Algebra".

Summer 2017: I organized, with Elina Robeva, a mini-symposium in the SIAM Conference in Applied Algebraic Geometry, called "Tensors: From Algebra to Applications".

Spring 2017: I organized the workshop Interactions between Algebra and the Sciences with Jacinta Torres.

Fall 2016: I co-organized a tensors reading group Foundational Tensor Theory with Rockford Sison.

Fall 2015: I organized a Commutative Algebra reading group.

Summer 2013: I did a research project at Imperial College, London under the supervision of Mike Levin. We analysed biological pathways associated with susceptibility to inflammatory diseases.

Summer 2012: I attended the Kupcinet-Getz Program at the Weizmann Institute in Israel. I worked with Sergei Yakovenko on algebraic properties of local dynamics of intersections. We wrote a paper, see above.

Links

Teaching

Trinity 2020: Tutorials for Statistics and Data Analysis, The Queen's College, Oxford.

Spring 2018: GSI for Math 10B with Prof. Kelli Talaska, UC Berkeley.

Spring 2017: Head GSI for Math 10B with Prof. Craig Evans. A fun worksheet I made for the last class of the semester, UC Berkeley.

Spring 2016: I organized a Mathematical Biology reading group for a group of Berkeley undergraduate students.

Fall 2015: GSI for Math 10A with Prof. Richard Bamler, UC Berkeley.