Exercises:Mond - Topology - 4/Section B

Section B

Question 6

Part A

Let $\partial I^2$ denote the boundary of the square. Let $P\in\text{Int}(I^2)$ considered as a subset of $\mathbb{R}^2$. Find a retraction, $r:(I^2-{P})\rightarrow \partial I^2$