Powers of ideals and the cohomology of stalks and fibers of morphisms

@inproceedings{Chardin2013PowersOI,
  title={Powers of ideals and the cohomology of stalks and fibers of morphisms},
  author={Marc Chardin},
  year={2013}
}
We first provide here a very short proof of a refinement of a theorem of Kodiyalam and Cutkosky, Herzog and Trung on the regularity of powers of ideals. This result implies a conjecture of Hà and generalizes a result of Eisenbud and Harris concerning the case of ideals primary for the graded maximal ideal in a standard graded algebra over a field. It also implies a new result on the regularities of powers of ideal sheaves. We then compare the cohomology of the stalks and the cohomology of the… CONTINUE READING