Abstract
A semigroup may be defined as a subset of a group which contains the unit and is closed under multiplication. But the only one to be considered in this chapter is that of all non-negative reals, as a subset of the group of all real numbers under addition. This is the basic case for extension to Lie semigroups, just as the theory of one-parameter groups is the basic case for extension to the representation theory of Lie groups.
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© 1978 Springer-Verlag Berlin Heidelberg
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Segal, I.E., Kunze, R.A. (1978). Semigroups and Perturbation Theory. In: Integrals and Operators. Grundlehren der mathematischen Wissenschaften, vol 228. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-66693-3_11
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DOI: https://doi.org/10.1007/978-3-642-66693-3_11
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-66695-7
Online ISBN: 978-3-642-66693-3
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