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This paper gives a characterization of the permutation group PSL(2, K) over a quadratic closed field of characteristic 2.

Herrn Professor Dr. H. Salzmann zum 60. Geburtstag gewidmet.  相似文献   

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Motivated by an investigation ofKuz'min [2], in this note we introduce a topology on the set of nonassociative algebras of a fixed dimensionr< over a local fieldF. We obtain a space, which is notT 1. If the trivial algebra is removed, the remaining subspace is quasicompact. The space is homeomoprhic to the group of square classes ofF *; forr3 the space is notT 1. The set of division algebras is open in.  相似文献   

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Becker has shown in [1] that for the 4-th Pythagoras number of the field (X) the inequality P4 ((X)) 36 holds. In this paper we will show P4 ((X)) 24 and P4 (K) 3 for all real pythagorean fields K.  相似文献   

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