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math.CO2026
Linear Spaces over Perfect Idylls
Jeffery Liu
We construct a category of vector space-like objects called linear spaces over perfect idylls (an algebraic structure generalizing fields and hyperfields), which is a specializ…
math.CO2024
A "Staircase" formula for the Chern-Schwartz-MacPherson cycle of a matroid
Franquiz Caraballo Alba, Jeffery Liu
We provide a formula for the Poincaré dual of the Chern-Schwartz-MacPherson (CSM) cycle of a matroid in the Chow ring of the matroid. We derive the formula from the case of matroid…