Let \(M\) be a compact manifold with boundary. Show that \(M\) does not retract onto \(\partial M\).
Question
Math 6510 • Differentiable Manifolds
Winter 2005 • Question 17
Question
Winter 2005 • Question 17
Let \(M\) be a compact manifold with boundary. Show that \(M\) does not retract onto \(\partial M\).