Merge branch 'master' of https://git.abstractnonsen.se/josia-notes/w23-logic-2

inputs/lecture_02.tex

@@ -9,7 +9,7 @@
 
 \begin{remark}
     \begin{itemize}
-        \item If $\emptyset \neq  O   \R$
+        \item If $\emptyset \neq  O \overset{\text{open}}{\subseteq} \R$
             then $O \sim \R$.
         \item If $O \subseteq \R$
             is open, then $O$ is the union of open intervals

inputs/lecture_03.tex

@@ -1,8 +1,7 @@
 \lecture{03}{2023-10–23}{Cantor-Bendixson}
 
 \begin{theorem}[Cantor-Bendixson]
-    \yaref{thm:cantorbendixson}{Cantor-Bendixson}{Cantor-Bendixson}
-
+    \yalabel{Cantor-Bendixson}{Cantor-Bendixson}{thm:cantorbendixson}
     If $A \subseteq  \R$ is closed,
     it is either at most countable or else
     $A$ contains a perfect set.
@@ -128,6 +127,3 @@ all condensation points are accumulation points.
 %     is at most countable.
 %     Also $A'$ is closed.
 % \end{remark}
-
-
-