Abstract
We prove that if is aconnected -space with at most three cells of positive dimension, then the self homotopy set of becomes a group relative to the binary operation induced from any multiplication on , and we determine it's group structure in some cases.
Citation
Mamoru MIMURA. Hideaki ŌSHIMA. "Self homotopy groups of Hopf spaces with at most three cells." J. Math. Soc. Japan 51 (1) 71 - 92, January, 1999. https://doi.org/10.2969/jmsj/05110071
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