L2- Singular dichotomy for orbital measures on complex groups

S. K. Gupta*, K. E. Hare

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


It is known that all continuous orbital measures, μ,on a compact, connected, classical simple Lie group G or its Lie algebra satisfy a dichotomy: either μk εL2 or μk is purely singular to Haar measure. In this note we prove that the same dichotomy holds for the dual situation, continuous orbital measures on the complex group G C. We also determine the sharp exponent k such that any k-fold convolution product of continuous G-bi-invariant measures on GC is absolute continuous with respect to Haar measure.

Original languageEnglish
Pages (from-to)409-419
Number of pages11
JournalBollettino dell'Unione Matematica Italiana
Issue number3
Publication statusPublished - 2010

ASJC Scopus subject areas

  • General Mathematics


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