Added some linfty.
Compile Project / Compile (push) Successful in 52s

This commit is contained in:
Bokuan Li
2026-08-18 21:47:50 -04:00
parent e1fd4219a5
commit f65e49fccf
4 changed files with 117 additions and 66 deletions
-8
View File
@@ -65,13 +65,5 @@
By \autoref{theorem:gelfand-naimark}, $A$ and $C(\Omega(A); \complex)$ are isomorphic as $C^*$-algebras. In particular, $A_{sa}$ and $C(\Omega(A); \real)$ are isomorphic as ordered vector spaces, so $A_{sa}$ is order complete if and only if $C(\Omega(A); \real)$ is order complete. Thus the \hyperref[Stone-Nakano Theorem]{theorem:stone-nakano-extremely-disconnected} implies that $A_{sa}$ is order complete if and only if $\Omega(A)$ is extremely disconnected.
\end{proof}
\begin{corollary}
\label{corollary:linfinity-extremely-disconnected}
Let $(X, \cm, \mu)$ be a localisable measure space, then $\Omega(L^\infty(X))$ is extremely disconnected.
\end{corollary}
\begin{proof}
By \autoref{corollary:l-infty-dedekind-complete}, $L^\infty(X; \real)$ is order complete. By \autoref{corollary:stonean-commutative-algebra}, $\Omega(L^\infty(X))$ is extremely disconnected.
\end{proof}