Author:
Craven Thomas C.,Smith Tara L.
Abstract
For a pythagorean field F with semiordering Q and associated preordering T, it is shown that the Witt ring WT (F) is isomorphic to the Witt ring W (K) whre K is a closure of F with respect to Q. For an arbitrary preordering T, it is shown how the covering number of T relates to the construction of WT (F).
Publisher
Cambridge University Press (CUP)
Reference21 articles.
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1. Abstract theory of semiorderings;Bulletin of the Australian Mathematical Society;2005-10