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math.CO2025
On the recognition problem for limits of entropy functions
Geva Yashfe
We prove that there is no algorithm to decide whether a given integer vector is in the closure of the entropic cone . Equivalently, there is no decision proce…
math.CO2025
On graphs, homology bases, and triangulated homology spheres
Karim Adiprasito, Marc Lackenby, Juan Souto +1
We describe a construction that takes as input a graph and a basis for its first homology, and returns a triangulation of a 3-dimensional homology sphere. This makes precise an ide…