Exercises:Saul - Algebraic Topology - 1/Exercise 1.2/Lemmas

Exercises

Exercise 1.2

Lemmas

Point removal

Let [ilmath](X,\mathcal{ J })[/ilmath] and [ilmath](Y,\mathcal{ K })[/ilmath] be topological spaces and let [ilmath]f:X\rightarrow Y[/ilmath] be any map (possibly continuous) between them.