3 papers
math.AG2026
Equations of Tree Tensor Network Varieties
Serkan Hoşten, Niharika Chakrabarty Paul, Otto T. P. Schmidt +1
We show that tree tensor network varieties, including tensor train varieties, are general Markov models associated to spaced trees. This allows us to prove that the prime ideals of…
math.AG2025
Torus Actions on Matrix Schubert and Kazhdan-Lusztig Varieties, and their Links to Statistical Models
Elke Neuhaus, Irem Portakal, Niharika Chakrabarty Paul
We investigate the toric geometry of two families of generalised determinantal varieties arising from permutations: Matrix Schubert varieties () and Kazhdan-Lusztig…
math.AG2024
Geometry of rational quasi-independence models as toric fiber products
Jane Ivy Coons, Heather A. Harrington, Niharika Chakrabarty Paul
We investigate the geometry of a family of log-linear statistical models called quasi-independence models. The toric fiber product is useful for understanding the geometry of param…