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most citedUnramified representations of reductive groups over finite rings

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math.RA2012

Similarity and commutators of matrices over principal ideal rings

Alexander Stasinski

We prove that if R is a principal ideal ring and A\in\M_n(R) is a matrix with trace zero, then A is a commutator, that is, A=XY-YX for some X,Y\in\M_n(R). This generalises the corr…