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partowp 2026-05-06 18:03:26 +01:00
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commit 5efaa3619c

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@ -2239,7 +2239,9 @@ Barr relator is a generalization of the Egli-Milner relator, where the functor i
\iff&(F\pi_1)^\op(s)\;=\; (F\pi_2^\op)(t)\\
\iff&s\; F\pi_2\comp(F\pi_1)^\op\;t\\
\iff&s\;\bar{F}r\;t
\end{align*}\qed
\end{align*}
So we have $\hat{\overrightarrow{F}}\leq \bar{F}$.
Now, we are left to show that $\bar{F}\leq\hat{\overrightarrow{F}}$. For that, reading the given proof from the end to the starting point is sufficient.
\end{proof}
\begin{prop}