English Quasi-fibration Cited by user GJ1729 on 27 Apr 2022 for all x ∈ B, y ∈ p−1(x) and i ≥ 0. For i = 0,1 one can only speak of bijections between the two sets.
English Symmetric product (topology) Cited by user 134.2.251.24 on 27 Apr 2022 In algebraic topology, the nth symmetric product of a topological space consists of the unordered n-tuples of its elements.
English Dold–Thom theorem Cited by user 134.2.251.24 on 27 Apr 2022 In algebraic topology, the Dold–Thom theorem, proved by, states that the homotopy group πi(SP(X)) of the infinite symmetric product SP(X) of a connected CW complex X is…