If a sequence $\{f_n\}$ converges to $f$ uniformly in $\mathbb{R}$, does it follow that $(f_n)^2$ converges to $f^2$ uniformly?
2026-04-24 03:42:29.1777002149
A sequence converges uniformly
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Edit : This is true if $f$ is bounded, as pointed out by @PedroTamaroff.
Yes, since $(f_n)$ is uniformly bounded (why?) and $$ |f_n^2(x) - f^2(x)| = |f_n(x) -f(x)||f_n(x) + f(x)| $$