If $f:\mathbb{R^n}\rightarrow\mathbb{R^m}$ is continuous and $A\subset\mathbb{R^m}$ is path-connected, then $f^{-1}(A)$ path-connected?
2025-01-12 22:20:33.1736720433
If $f$ is continuous and $A$ is path-connected, then $f^{-1}(A)$ path-connected
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Try $n=m=1$, $f: x \mapsto x^2$ and $A = (1,\infty)$.