Bayer-Fluckiger, Eva2011-03-172011-03-172011-03-17200710.1093/imrn/rnm112https://infoscience.epfl.ch/handle/20.500.14299/65418WOS:000206288300108Let k be a field of characteristic $\neq$ 2, and let G be a finite group. The aim of this article is to give a cohomological criterion for the isomorphism of multiples of trace forms of G-Galois algebras over k. The proof uses results concerning multiples of hermitian forms over division algebras with involution that are of independent interest.text::journal::journal article::research article