Brouwer fixed point theorem states that for any compact convex set $X$, a continuous mapping from $X$ to $X$ has at least one fixed point.
Brouwer fixed point theorem applies in particular on the close unit ball of a finite dimensional space.
Do you have counterexample(s) where Brouwer fixed point theorem does not hold on the close unit ball of a Banach space (of infinite dimension)?
Note: this question is a refinement of this one which was put on hold.
Best Answer
A comment in the other question mentioned that the wiki page for the Brouwer Fixed Point Theorem had a counterexample for the Hilbert space $\ell^2$. I'll adapt the statement there to $\ell^p$ where $p < \infty$ so you can compare the two: