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Pàgina inicial > Articles > Articles publicats > Property of rapid decay for extensions of compactly generated groups |
Data: | 2015 |
Resum: | In the article we settle down the problem of permanence of property RD under group extensions. We show that if 1 ! N ! G ! Q ! 1 is a short exact sequence of compactly generated groups such that Q has property RD, and N has property RD with respect to the restriction of a word-length on G, then G has property RD. We also generalize the result of Ji and Schweitzer stating that locally compact groups with property RD are unimodular. Namely, we show that any automorphism of a locally compact group with property RD which distorts distances subexponentially, preserves the Haar measure. |
Drets: | Tots els drets reservats. |
Llengua: | Anglès |
Document: | Article ; recerca ; Versió publicada |
Matèria: | Property RD ; Group extension |
Publicat a: | Publicacions matemàtiques, Vol. 59 Núm. 2 (2015) , p. 301-312 (Articles) , ISSN 2014-4350 |
12 p, 304.1 KB |