Similarity of quadratic forms over global fields in characteristic 2

Zhengyao Wu

Published 2019-04-04Version 1

Let $ K $ be a global function field of characteristic $ 2 $. For each non-trivial place $ v $ of $ K $, let $ K_{v} $ be the completion of $ K $ at $ v $. We show that if two non-degenerate quadratic forms are similar over every $ K_{v} $, then they are similar over $ K $. This provides an analogue of the case for characteristic not $ 2 $ previously obtained by T.Ono.