3 papers
math.AG2026
Grothendieck weights and K-theoretic positivity for matroids
Yiyu Wang
We introduce a method for studying -theoretic positivity on permutohedral toric varieties through the topology of spaces arising in tropical geometry. The key ingredient is the…
math.AG2026
Grothendieck Weights on Permutohedral Varieties and Matroids
Yiyu Wang
Grothendieck weights, introduced by Shah, are -theoretic analogues of Minkowski weights on smooth toric varieties. We study Grothendieck weights on the permutohedral fan and pro…
math.AG2024
Microlocal multiplicity of matroid Schubert varieties
Yiyu Wang
We study the multiplicity number of the characteristic cycle of the intersection complex of the matroid Schubert variety. It is shown to be a combinatorial invariant, and it can be…