Homotopy Theory (Pure and Applied Mathematics 8) by Sze-Tsen Hu PDF

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  • February 13, 2018
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9 are any maps, then f + g and 1g are the maps in A defined by (/ g)(z) (z)g(z), (fg)(z) = f [g(z)] for every z e Since the homotopy classes [/ ± g] and [fg] obviously depend only on the classes [f] and [g], this ring structure of A induces a ring structure in n(Sl; 9).

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Homotopy Theory (Pure and Applied Mathematics 8) by Sze-Tsen Hu


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