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математика
слабая гомотопия
['wi:kintə'rækʃ(ə)n]
общая лексика
слабое взаимодействие
физика
слабое бета-распадное взаимодействие
математика
гомотопический класс
In mathematics, the Puppe sequence is a construction of homotopy theory, so named after Dieter Puppe. It comes in two forms: a long exact sequence, built from the mapping fibre (a fibration), and a long coexact sequence, built from the mapping cone (which is a cofibration). Intuitively, the Puppe sequence allows us to think of homology theory as a functor that takes spaces to long-exact sequences of groups. It is also useful as a tool to build long exact sequences of relative homotopy groups.