Let \(D^n\) be a closed \(n\)-dimensional disk. Prove that if \(f\) is a homeomorphism of \(D^n\), then \(f\) fixes some \(x\in D^n\).
Question
Math 6510 • Differentiable Manifolds
Summer 2017 • Question 12
Question
Summer 2017 • Question 12
Let \(D^n\) be a closed \(n\)-dimensional disk. Prove that if \(f\) is a homeomorphism of \(D^n\), then \(f\) fixes some \(x\in D^n\).