Semi-continuity of conductors, and ramification bound of nearby cycles
Semi-continuity of conductors, and ramification bound of nearby cycles
Abstract For a constructible étale sheaf on a smooth variety of positive characteristic ramified along an effective divisor, the largest slope in Abbes and Saito’s ramification theory of the sheaf gives a divisor with rational coefficients called the conductor divisor . In this article, we prove decreasing properties of the …