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math.OC2026
Hardness of integer linear feasibility with cyclic support
Marco Di Summa
We prove that integer linear feasibility is strongly -complete even when the constraint matrix has exactly two nonzero entries in every row and column, with its support forming…
math.CO2026
The red-blue-yellow matching problem
Manuel Aprile, Marco Di Summa
We consider the red-blue-yellow matching problem: given two natural numbers , and a graph whose edges are colored red, blue or yellow, the goal is to find a matching…