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How to prove the product of Whitehead manifold and $\mathbb{R}$ is homeomorphic to $\mathbb{...

I am currently reading Rolfsen's "Knots and Links". At page 82 Whitehead manifold $W$ is defined and an exercise asking to show that $W\times \mathbb{R}\cong \mathbb{R}^4$ is left. Reference in Wiki s …
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