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Template:Self-functor on topospaces
Given a topological space X {\displaystyle X} , the cone space of X {\displaystyle X} , denoted as C X {\displaystyle CX} , is defined as the quotient of X × I {\displaystyle X\times I} by the equivalence relation:
( x 1 , 0 ) ∼ ( x 2 , 0 ) ∀ x 1 , x 2 ∈ X {\displaystyle (x_{1},0)\sim (x_{2},0)\forall x_{1},x_{2}\in X}
Template:Contractible
