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math.AG2026
Topology and Euler characteristics of tropical varieties
Scott Hiatt, Connor Simpson, Botong Wang +1
We study Euler characteristics of tropical subvarieties of tropical abelian varieties. We prove that every H-regular subvariety, locally modeled on tropicalizations of sufficiently…
math.CO2026
On determinants of resistance matrices
Harry Richman, Farbod Shokrieh, Chenxi Wu
We prove a new combinatorial identity for the determinant of the resistance matrix of a finite graph, which involves counts of spanning trees and forests. This generalizes a result…
math.GT2026
Every Weak Perron Number is an End-Periodic Stretch Factor
Paige Hillen, Marissa Loving, Chenxi Wu
Given any weak Perron number , we construct an end-periodic homeomorphism with Handel-Miller stretch factor equal to where is a connected infinite-typ…