In topology, especially algebraic topology, the cone of a topological space X {\displaystyle X} is intuitively obtained by stretching X into a cylinder and then collapsing one of its end faces to a point. The cone of X is denoted by C X {\displaystyle CX} or by cone ( X ) {\displaystyle \operatorname {cone} (X)} .
In topology, especially algebraic topology, the cone of a topological space X {\displaystyle X} is intuitively obtained by stretching X into a cylinder and then collapsing one of its end faces to a point. The cone of X is denoted by C X {\displaystyle CX} or by cone ( X ) {\displaystyle \operatorname {cone} (X)} .
Source: Wikipedia "Cone (topology)" · CC BY-SA 4.0
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