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Additive groups and semigroups of matrices on which the exponential is a homomorphism
matrix pencils commuting exponentials property L
2011/2/24
Let G be a subgroup of (Mn(C),+). We show that M 7→ exp(M)is a group homomorphism from G to (GLn(C),×) if and only if G con-sists of commuting matrices. We also prove that if S is a sub-semigroup of (...