Abstract

Let D be an infinite division ring with centre F and the group of infinite upper triangular invertible matrices indexed by over D. In this paper, we first show that if D is finite dimensional over F, then every element in whose diagonal entries are commutators of is a commutator of an infinite diagonal matrix and another infinite upper triangular matrix. Some applications are also shown. For example, if , then every element in the commutator subgroup of the Vershik-Kerov group is a commutator.

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