2 papers
math.AG2004
Twists of symmetric bundles
Ph. Cassou-Nogues, B. Erez, M. J. Taylor
We establish comparison results between the Hasse-Witt invariants w_t(E) of a symmetric bundle E over a scheme and the invariants of one of its twists E_α. For general twists we de…
math.NT2004
Pfaffians, the G-Signature Theorem and Galois de Rham discriminants
T. Chinburg, G. Pappas, M. J. Taylor
We study equivariant de Rham discriminants associated to arithmetic varieties which support a tame action by a finite group; we form these discriminants by endowing the de Rham coh…