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math.AC2026
Splitting the Matroid Determinant
Clara Briand, Leonie Kayser, Julian Weigert
The principal matroid determinant of a linear space has been introduced in recent work by Matsubara-Heo and Telen. In this paper, we give the compl…
math.CO2026
Polar Degrees of Matroids
Clara Briand, Leonie Kayser, Julian Weigert
We show that the polar degrees of the coordinate-wise inverse of a linear subspace are given by the coefficients of a substitution of the reduced charact…
math.HO2026
Benchmarks in Leipzig
Andrei Balakin, Miklós Bóna, Marie-Charlotte Brandenburg +45
Between April 1 and May 15, 2026, a group of 49 mathematicians compiled a dataset of research-level mathematics questions with known answers. Most of the work was done during the t…