A Castelnuovo-Mumford regularity bound for scrolls

Published 8 Mar 2016 in math.AG | (1603.02382v2)

Abstract: Let $X \subseteq \mathbb{P}^r$ be a scroll of codimension $e$ and degree $d$ over a smooth projective curve of genus $g$. The purpose of this paper is to prove a linear Castelnuovo-Mumford regularity bound that reg$(X) \leq d-e+1+g(e-1)$. This bound works over an algebraically closed field of arbitrary characteristic.

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