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math.AC2022
Cohen-Macaulay binomial edge ideals of small graphs
Davide Bolognini, Antonio Macchia, Giancarlo Rinaldo +1
A combinatorial property that characterizes Cohen-Macaulay binomial edge ideals has long been elusive. A recent conjecture ties the Cohen-Macaulayness of a binomial edge ideal $J_G…
math.AC2022
Powers of monomial ideals with characteristic-dependent Betti numbers
Davide Bolognini, Antonio Macchia, Francesco Strazzanti +1
We explore the dependence of the Betti numbers of monomial ideals on the characteristic of the field. A first observation is that for a fixed prime either the -th Betti numb…