On a complex semigroup containing the group of diffeomorphisms of a circle (Q1093216)
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scientific article; zbMATH DE number 4022187
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | On a complex semigroup containing the group of diffeomorphisms of a circle |
scientific article; zbMATH DE number 4022187 |
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On a complex semigroup containing the group of diffeomorphisms of a circle (English)
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1987
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The structure of a complex semigroup is introduced in the set of all formal products \(g \exp(i a(\phi) \partial /\partial \phi)\), where g is an orientation-preserving analytic diffeomorphism of the circle, \(a(\phi)>0\).
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complex semigroup
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orientation-preserving analytic diffeomorphism
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