Cone space

This article describes a construct that involves some variant of taking a product of a topological space with the unit interval and then making some identifications, typically at the endpoints, based on some specific maps.
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Definition

Given a topological space $X$, the cone space of $X$, denoted as $CX$, is defined as the quotient of $X\times I$ by the equivalence relation:

$(x_{1},0)\sim (x_{2},0)\forall x_{1},x_{2}\in X$

Refer:

• Cone space functor to see the properties of the cone space functor
• Cone-realizable space to see the property of a topological space being realizable as the cone space over some space