Updated spelling of barreled to barrelled for consistency.
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@@ -25,14 +25,14 @@
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\begin{summary}
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\label{summary:barreled-space}
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The following types of locally convex spaces are barreled:
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The following types of locally convex spaces are barrelled:
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\begin{enumerate}
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\item Every locally convex space with the Baire property.
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\item Every Banach space and every Fréchet space.
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\item Inductive limits of barreled spaces.
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\item Inductive limits of barrelled spaces.
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\item Spaces of type (LB) and (LF).
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\item The locally convex direct sum of barreled spaces.
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\item Products of barreled spaces.
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\item The locally convex direct sum of barrelled spaces.
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\item Products of barrelled spaces.
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\end{enumerate}
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\end{summary}
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\begin{proof}
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@@ -46,7 +46,7 @@
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\begin{proposition}
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\label{proposition:baire-barrel}
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Let $E$ be a locally convex space over $K \in \RC$. If $E$ is a Baire space, then $E$ is barreled.
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Let $E$ be a locally convex space over $K \in \RC$. If $E$ is a Baire space, then $E$ is barrelled.
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\end{proposition}
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\begin{proof}[Proof, {{\cite[II.7.1]{SchaeferWolff}}}. ]
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Let $D \subset E$ be a Barrel, then $E = \bigcup_{n \in \natp}nD$ is a countable union of closed sets. Since $E$ is Baire, there exists $n \in \natp$, $U \in \cn_E(0)$ circled, and $x \in E$ such that $x + U \in nB$. In which case,
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@@ -59,9 +59,9 @@
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\begin{proposition}
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\label{proposition:barrel-limit}
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Let $\seqi{E}$ be locally convex spaces over $K \in \RC$, $E$ be a vector space over $K$, and $\seqi{T}$ such that $T_i \in \hom(E_i; E)$ for all $i \in I$, then the inductive locally convex topology on $E$ induced by $\seqi{T}$ is barreled.
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Let $\seqi{E}$ be locally convex spaces over $K \in \RC$, $E$ be a vector space over $K$, and $\seqi{T}$ such that $T_i \in \hom(E_i; E)$ for all $i \in I$, then the inductive locally convex topology on $E$ induced by $\seqi{T}$ is barrelled.
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\end{proposition}
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\begin{proof}[Proof, {{\cite[II.7.2]{SchaeferWolff}}}. ]
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Let $D \subset E$ be a barrel, then for each $i \in I$, $T_i^{-1}(D) \subset E_i$ is also a barrel, and thus a neighbourhood of $0$ in $E_i$. By (5) of \autoref{definition:lc-inductive}, $D$ is a neighbourhood of $0$ in $E$, so $E$ is barreled.
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Let $D \subset E$ be a barrel, then for each $i \in I$, $T_i^{-1}(D) \subset E_i$ is also a barrel, and thus a neighbourhood of $0$ in $E_i$. By (5) of \autoref{definition:lc-inductive}, $D$ is a neighbourhood of $0$ in $E$, so $E$ is barrelled.
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\end{proof}
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@@ -16,6 +16,15 @@
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(5) $\Rightarrow$ (1): Let $V \in \cn_F(0)$, then $U = \bigcap_{T \in \alg}T^{-1}(V) \in \cn_E(0)$. Thus for any $x, y \in E$ with $x - y \in U$, $Tx - Ty \in V$ for all $T \in \alg$.
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\end{proof}
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\begin{proposition}
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\label{proposition:equicontinuous-bounded}
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Let $E, F$ be TVSs over $K \in \RC$ and $\alg \subset L(E; F)$ be equicontinuous, then for any ideal $\sigma \subset \mathfrak{B}(E)$, $\alg$ is a bounded subset of $B_\sigma(E; F)$.
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\end{proposition}
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\begin{proof}
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Let $S \in \sigma$ and $U \in \cn_F(0)$, then there exists $V \in \cn_E(0)$ such that $\bigcup_{T \in \alg}T(V) \subset U$. Since $S$ is bounded, there exists $\lambda \in K$ such that $S \subset \lambda V$. Therefore $\bigcup_{T \in \alg}T(S) \subset \lambda U$, and $\alg$ is bounded in $B_\sigma(E; F)$.
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\end{proof}
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\begin{proposition}[{{\cite[IV.4.3]{SchaeferWolff}}}]
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\label{proposition:equicontinuous-linear-closure}
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Let $E, F$ be TVSs over $K \in \RC$ and $\alg \subset L(E; F)$ be equicontinuous, and $\alg'$ be the closure of $\alg$ in $F^E$ with respect to the product topology, then $\alg'$ is equicontinuous and hence $\alg' \subset L(E; F)$.
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@@ -29,7 +38,7 @@
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Let $E, F$ be TVSs over $K \in \RC$ and $\alg \subset L(E; F)$. Suppose that one of the following holds:
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\begin{enumerate}
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\item[(B)] $E$ is a Baire space.
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\item[(B')] $E$ is barreled and $F$ is locally convex.
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\item[(B')] $E$ is barrelled and $F$ is locally convex.
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\end{enumerate}
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and that
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@@ -86,7 +95,7 @@
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Let $E, F, G$ be TVSs over $K \in \RC$ and $\alg$ be separately continuous bilinear maps from $E \times F$ to $G$. If one of the following holds:
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\begin{enumerate}
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\item[(B)] $E$ is Baire.
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\item[(B')] $E$ is barreled and $G$ is locally convex.
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\item[(B')] $E$ is barrelled and $G$ is locally convex.
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\end{enumerate}
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and that
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