준진동

Quasi-fibration

In algebraic topology, a branch of mathematics, a quasi-fibration, introduced by Albrecht Dold and René Thom, is a continuous map of topological spaces such that the fibers are homotopy equivalent to the homotopy fiber of f via the canonical map.

모든 진동은 준진동이지만 그 반전은 사실이 아니다.예를 들어 문자 L의 베이스 간격에 대한 투영은 준진동(모든 섬유는 수축 가능)이지만 진동은 아니다.

참조

  • Dold, Albrecht; Thom, René (1958), "Quasifaserungen und unendliche symmetrische Produkte", Annals of Mathematics, Second Series, 67: 239–281, doi:10.2307/1970005, ISSN 0003-486X, JSTOR 1970005, MR 0097062
  • May, J.Peter (1990), "Weak equivalences and quasifibrations" (PDF), Groups of self-equivalences and related topics (Montreal, PQ, 1988), Lecture Notes in Mathematics, vol. 1425, Berlin: Springer, pp. 91–101, doi:10.1007/BFb0083834, MR 1070579

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