The ramification sequence for a fixed point of an automorphism of a curve and the Weierstrass gap sequence

Kontogeorgis, A.

Abstract

For nonsingular projective curves defined over algebraically closed fields of positive characteristic the dependence of the ramification filtration of decomposition groups of the automorphism group with Weierstrass semigroups attached at wild ramification points is studied. A faithful representation of the p-part of the decomposition group at each wild ramified point to a Riemann-Roch space is defined