Hi, let ##h: A \rightarrow A ##be a homomorphism between algebraic structures. Is there a nice result describing the(adsbygoogle = window.adsbygoogle || []).push({});

properties of ##Ker h^2 ## , where ##h^2 = hoh ## (composition) ? Clearly , ## ker( h) \subset ker (h^2 )## , but are there some other results relating the two; maybe relating kerh to ker h^n?

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# Properties of Kernels of Homeomorphisms

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