“essential mapping”的概念、定义、翻译、参考文献-科学参考

单词	essential mapping
释义	essential mapping [i¦sen·chǝl `map·iŋ] ^MATHEMATICS A mapping between topological spaces that is not homotopic to a mapping whose range is a single point.
随便看	loose pulley Looser-Milkman syndrome loose round Lopadorrhynchidae loparite lopezite Lophialetidae Lophiiformes lophine Lophiodontidae lophocercous lophocyte lophodont Lophogastrida lophophore lophotrichous lopolith lopping shears lorac lorad loran loran A loran C loran chain loran chart

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