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For this and some results for the case that 𝑁 is not abelian, see our paper out today — https://t.co/cIgExdlkOp @CamOpenAccess @cambUP_maths
For this and some results for the case that 𝑁 is not abelian, see our paper out today — https://t.co/cIgExdlkOp @CamOpenAccess @cambUP_maths