diff options
Diffstat (limited to 'library/ordinal.tex')
| -rw-r--r-- | library/ordinal.tex | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/library/ordinal.tex b/library/ordinal.tex index 6f924c1..c092fa8 100644 --- a/library/ordinal.tex +++ b/library/ordinal.tex @@ -559,7 +559,7 @@ Then $\alpha\subseteq\beta$. \end{lemma} \begin{proof} Suppose not. - Then $\emptyset\precedes \emptyset$ by \cref{notin_emptyset,limit_ordinal}. + Then $\emptyset\precedes \emptyset$ by \cref{emptyset,limit_ordinal}. Thus $\emptyset\in \emptyset$. Contradiction. \end{proof} @@ -636,4 +636,4 @@ Then $\alpha\subseteq\beta$. % $\emptyset\precedes \naturals$. % If $n\in \naturals$, then $\suc{n}\in\naturals$. %\end{proof} -%
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