Complements about Witt Rings and Other Topics
This chapter contains some complements to previous chapters, which the authors have preferred to postpone until the last chapter. The quadratic Witt ring defined in 2.7 opens this chapter. In 8.1 we get precise results about this Witt ring when K is a local ring in which 2 is invertible. But in 8.2 where 2 is not invertible in the local ring K, we do not reach so effective and general results.
KeywordsLocal Ring Orthogonal Basis Quadratic Extension Group Morphism Quadratic Space
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