Marc Besson

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20192026

most citedVertices of Intersection Polytopes and Rays of Generalized Kostka Cones

2 citations · 3 across the 9 of their papers we have counts for

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math.AG2026

Derived Enhancements of $T$ -fixed subschemes

Marc Besson, Shiyixin Liang

For $X$ a conical affine symplectic singularity with $T = T \times G_{m}$ -action, the fixed scheme $X^{T}$ and the map $X^{T} \to X$ carry much information about…

math.RT2026

Tangent spaces of spherical Schubert varieties and counterexamples to the reducedness conjecture

Marc Besson, Jiuzu Hong, Huanhuan Yu

Given a simply-connected simple algebraic group $G$ , we determine the tangent space of any Finkelberg-Mirković Schubert scheme at the base point of the affine Grassmannian of $G$ .…

math.RT2026

Reduction rules for Demazure modules

Marc Besson, Sam Jeralds, Joshua Kiers

For $G$ a complex reductive group and $B \subseteq G$ a Borel subgroup, we provide a reduction rule for certain weight multiplicities in Demazure modules $V_{λ}^{w}$ : given a weight $μ…

Derived Enhancements of T-fixed subschemes

Tangent spaces of spherical Schubert varieties and counterexamples to the reducedness conjecture

Reduction rules for Demazure modules

Derived Enhancements of $T$ -fixed subschemes