3 papers
math.AG2025
Quantum periods, toric degenerations and intrinsic mirror symmetry
Sam Johnston
Given a Fano variety , and an affine log Calabi-Yau variety given as the complement of an anticanonical divisor , we prove that for any snc compactification …
math.FA2025
On the limiting Horn inequalities
Samuel G. G. Johnston, Colin McSwiggen
The Horn inequalities characterise the possible spectra of triples of -by- Hermitian matrices . We study integral inequalities that arise as limits of Horn inequalitie…
math.AG2024
Comparison of non-archimedean and logarithmic mirror constructions via the Frobenius structure theorem
Sam Johnston
For a log Calabi Yau pair (X,D) with X\D smooth affine, satisfying either assumption 1.1 of "The canonical wall structure and intrinsic mirror symmetry" or contains a Zariski dense…