2 papers
math.AG2026
Minimal Non-Weierstrass Semigroups
David Eisenbud, Frank-Olaf Schreyer
Let p in X be a point on a compact Riemann surface. The Weierstrass semigroup of p is the semigroup of pole orders of meromorphic functions on X that are regular at all but p. Hurw…
math.AC2023
Ideals and their Fitting ideals
David Eisenbud, Antonino Ficarra, Jürgen Herzog +1
For an ideal in a Noetherian ring , the Fitting ideals are studied. We discuss the question of when or $\sqrt{\textrm{Fitt}_j(I)}…