2 papers
math.AG2025
Faster computation of Whitney stratifications and their minimization
Martin Helmer, Rafael Mohr
We describe two new algorithms for the computation of Whitney stratifications of real and complex algebraic varieties. The first algorithm is a modification of the algorithm of Hel…
math.AG2024
Stratification of Projection Maps From Toric Varieties
Boulos El Hilany, Martin Helmer, Elias Tsigaridas
We prove a combinatorial version of Thom's Isotopy Lemma for projection maps applied to any complex or real toric variety. Our results are constructive and give rise to a method fo…