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content/Math4202/Math4202_L24.md

@@ -70,6 +70,12 @@ If we let $j:A\to X$ be the inclusion map, then $r\circ j=id_A$, and $j\circ r\s
 
 $S^1$ is a deformation retract of $\mathbb{R}^2-\{0\}$ 
 
+---
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+Consider $\mathbb{R}^2-p=q$, the doubly punctured plane. "The figure 8" space is the deformation retract.
+
+![Retraction of doubly punctured plane](https://notenextra.trance-0.com/Math4202/Retraction_of_doubly_punctured_plane.jpg)
+
 </details>
 
 #### Theorem for Deformation Retract