• 제목/요약/키워드: covariant maps

검색결과 2건 처리시간 0.014초

SELF-PAIR HOMOTOPY EQUIVALENCES RELATED TO CO-VARIANT FUNCTORS

  • Ho Won Choi;Kee Young Lee;Hye Seon Shin
    • 대한수학회지
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    • 제61권3호
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    • pp.409-425
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    • 2024
  • The category of pairs is the category whose objects are maps between two based spaces and morphisms are pair-maps from one object to another object. To study the self-homotopy equivalences in the category of pairs, we use covariant functors from the category of pairs to the group category whose objects are groups and morphisms are group homomorphisms. We introduce specific subgroups of groups of self-pair homotopy equivalences and put these groups together into certain sequences. We investigate properties of these sequences, in particular, the exactness and split. We apply the results to two special functors, homotopy and homology functors and determine the suggested several subgroups of groups of self-pair homotopy equivalences.