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Deflation and Residuation for Class Formation

✍ Scribed by Kuniaki Horie; Mitsuko Horie

Publisher
Elsevier Science
Year
2001
Tongue
English
Weight
114 KB
Volume
245
Category
Article
ISSN
0021-8693

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✦ Synopsis

In the present paper, recalling briefly a deflation map and a residuation map in the cohomology theory of finite groups, we shall see that a certain pair of isomorphisms of Tate's main theorem for class formations establishes a correspondence of the associated residuation map to the associated deflation map (Theorem 1). This result, supplementary to the results of Artin and Tate, will further provide us with a commutative diagram for Galois cohomology groups, which just generalizes a fundamental commutative diagram for number knots (Theorem 2).

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