pag12 - uniroma1.itTHE DERIVED CATEGORIES, ECT 101 maps f n : x n -+ Y n which commute with the maps...
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pag12 - uniroma1.itTHE DERIVED CATEGORIES, ECT 101 maps f n : x n -+ Y n which commute with the maps of complexes: for all n. Two maps are said to be homotopic if there is a …