Added notation pages for major sections.

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Bokuan Li
2026-04-23 02:56:47 -04:00
parent 945bfe9946
commit 9259cd1d86
10 changed files with 149 additions and 0 deletions

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\input{./uniform/index.tex}
\input{./functions/index.tex}
\input{./metric/index.tex}
\input{./notation.tex}

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src/topology/notation.tex Normal file
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\chapter{Notations}
\label{chap:topology-notations}
\begin{tabular}{lll}
\textbf{Notation} & \textbf{Description} & \textbf{Source} \\
\hline
% ---- General Topology ----
$\mathcal{N}_X(A)$, $\mathcal{N}(A)$, $\mathcal{N}^o(A)$ & Neighbourhood filter at $A$; open neighbourhoods of $A$. & \autoref{definition:neighbourhood} \\
$C(X; Y)$ & Continuous functions $X \to Y$. & \autoref{definition:continuity} \\
$E(d, r)$ & $\{(x,y) \in X \times X \mid d(x,y) < r\}$ for pseudometric $d$. & \autoref{definition:pseudometric-uniformity} \\
$B(x, r)$ & Open ball $\{y \in X \mid d(x,y) < r\}$ for pseudometric $d$. & \autoref{definition:pseudometric-uniformity} \\
$B(A, \varepsilon)$ & $\varepsilon$-fattening $\{x \in X \mid d(x, A) < \varepsilon\}$ of $A$. & \autoref{definition:fattening} \\
% Uniform Spaces
$UC(X; Y)$ & Uniformly continuous functions $X \to Y$. & \autoref{definition:uniformcontinuity} \\
$U^{-1}$ & Inversion of $U \subset X \times X$. & \autoref{definition:inversion} \\
$U \circ V$ & Composition of $U, V \subset X \times X$. & \autoref{definition:composition} \\
$U(A)$ & Slice of $U \subset X \times Y$ at $A \subset X$: $\{y \mid \exists x \in A,\, (x,y) \in U\}$. & \autoref{definition:slice} \\
$E(S, U)$ & Entourage of the form $\{(f,g) \in X^T \mid (f(x),g(x)) \in U\ \forall x \in S\}$. & \autoref{definition:set-uniform} \\
$\mathfrak{E}(\mathfrak{S}, \mathfrak{U})$ & $\mathfrak{S}$-uniformity, generated by $\{E(S,U) \mid S \in \mathfrak{S},\ U \in \mathfrak{U}\}$. & \autoref{definition:set-uniform} \\
% Function Spaces
$\mathrm{supp}(f)$ & Support of $f$. & \autoref{definition:support} \\
$C_c(X; E)$ & Compactly supported continuous functions $X \to E$. & \autoref{definition:compactly-supported} \\
$f \prec U$ & $f \in C_c(X; [0,1])$ with $\mathrm{supp}(f) \subset U$. & \autoref{definition:compactly-supported-01} \\
$C_0(X; E)$ & Continuous functions vanishing at infinity. & \autoref{definition:vanish-at-infinity} \\
$BC(X; E)$ & Bounded continuous functions $X \to E$. & \autoref{definition:bounded-continuous-function-space} \\
\end{tabular}