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Proceedings of the American Mathematical Society

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On extending characters

Author: Paul Milnes
Journal: Proc. Amer. Math. Soc. 82 (1981), 196-198
MSC: Primary 43A40; Secondary 43A35
MathSciNet review: 609650
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Abstract: Amplifying modestly on recent work of R. W. Henrichs, we indicate that, while the impossibility of extending a continuous character $ \psi $ on a subgroup $ H$ of a topological group $ G$ to a character on $ G$ is often due to algebraic problems, the impossibility of extending $ \psi $ to a continuous positive definite function on $ G$ can often be viewed as a problem with uniform continuity.

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Keywords: Topological group, positive definite function, character
Article copyright: © Copyright 1981 American Mathematical Society