Typo fixes.

This commit is contained in:
Bokuan Li
2026-03-15 12:32:31 -04:00
parent f951ccccdf
commit 62a8e78dfe
3 changed files with 29 additions and 18 deletions

View File

@@ -5,7 +5,7 @@
\label{definition:vanish-at-infinity}
Let $X$ be a topological space, $E$ be a TVS over $K \in \RC$, and $f \in C(X; E)$, then $f$ \textbf{vanishes at infinity} if for every $U \in \cn_E^o(0)$, $\bracs{f \not\in U}$ is compact.
The set $C_0(X; \complex)$ is the space of all functions that vanish at infinity.
The set $C_0(X; E)$ is the space of all functions that vanish at infinity.
\end{definition}
\begin{proposition}
@@ -35,6 +35,6 @@
\[
(\phi f - f)(X) = \underbrace{(\phi f - f)(\bracs{f \not\in U})}_{0} + \underbrace{(\phi f - f)(\bracs{f \in U})}_{\in U} \in U
\]
so $f \in \ol{C_c(X; E)}$.
\end{proof}

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@@ -70,15 +70,16 @@ The axioms of uniform spaces strongly resembles working in a metric space. In fa
\begin{enumerate}
\item[(FB1)] For any $J, J' \subset I$ finite and $r, r' > 0$,
\[
\bigcap_{j \in J \cup J'}E(d_j, \min(r,r')E(d_j, r \wedge r') \subset \paren{\bigcap_{j \in J}E(d_j, r)} \cap \paren{\bigcap_{j \in J'}E(d_j, r')}
\bigcap_{j \in J \cup J'}E(d_j, r \wedge r') \subset \paren{\bigcap_{j \in J}E(d_j, r)} \cap \paren{\bigcap_{j \in J'}E(d_j, r')}
\]
\item[(UB1)] For each $i \in I$, $d(x, x) = 0$ for all $x \in X$. Thus for any $i \in I$ and $r > 0$, $E(d_i, r)$ contains the diagonal.
\item[(UB2)] For each $J \subset I$ finite and $r > 0$,
\[
\paren{\bigcap_{j \in J}E(d_j, r/2)} \circ \paren{\bigcap_{j \in J}E(d_j, r)} \subset \bigcap_{j \in J}E(d_j, r/2) \circ E(d_j, r/2) \subset \bigcap_{j \in J}E(d_j, r)
\]
\begin{align*}
\paren{\bigcap_{j \in J}E(d_j, r/2)} \circ \paren{\bigcap_{j \in J}E(d_j, r)} &\subset \bigcap_{j \in J}E(d_j, r/2) \circ E(d_j, r/2) \\
&\subset \bigcap_{j \in J}E(d_j, r)
\end{align*}
by the triangle inequality.
\end{enumerate}