K1 of Chevalley groups are nilpotent

Roozbeh Hazrat, N. Vavilov

Research output: Contribution to journalArticlepeer-review

64 Citations (Scopus)


Abstract Let F be a reduced irreducible root system and R be a commutative ring. Further, let G(F,R) be a Chevalley group of type F over R and E(F,R) be its elementary subgroup. We prove that if the rank of F is at least 2 and the Bass-Serre dimension of R is finite, then the quotient G(F,R)/E(F,R) is nilpotent by abelian. In particular, when G(F,R) is simply connected the quotient K1(F,R)=G(F,R)/E(F,R) is nilpotent. This result was previously established by Bak for the series A1 and by Hazrat for C1 and D1. As in the above papers we use the localisation-completion method of Bak, with some technical simplifications.
Original languageEnglish
Pages (from-to)99-116
Number of pages18
JournalJournal of Pure and Applied Algebra
Issue number1-2
Publication statusPublished - 01 Apr 2003

ASJC Scopus subject areas

  • Algebra and Number Theory


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