\(
\newcommand{\cat}[1] {\mathrm{#1}}
\newcommand{\catobj}[1] {\operatorname{Obj}(\mathrm{#1})}
\newcommand{\cathom}[1] {\operatorname{Hom}_{\cat{#1}}}
\)
Math and science::Analysis::Tao::09. Continuous functions on R
Closed set (of reals), definition
A subset \( E \subseteq \mathbb{R} \) is said to be closed if
[...].
