diff --git a/draft/draft.tex b/draft/draft.tex index 5260171..e130c1c 100644 --- a/draft/draft.tex +++ b/draft/draft.tex @@ -1849,15 +1849,17 @@ Because assuming we have $\sigma$, for every given $\sigma'$ we can define a $\d \arrow["{{\mathcal{P}p_2}_\subseteq}"', from=3-2, to=3-3] \end{tikzcd} \end{equation*} -$\delta$ is defined as the following: +To define $\delta$, we define $c\c(\mathcal{P}R^\dagger)\to((\mathcal{P}R^\dagger)\times R)+(\mathcal{P}R)^\dagger$ and $u\c((\mathcal{P}R^\dagger)\times R)+(\mathcal{P}R)^\dagger\to\subseteq;(\mathcal{P}R)^\dagger;\subseteq$ and then we define $\delta=u\comp c$. Here are the definitions for $c$ and $u$: \begin{gather*} - \delta(w)= + c(w)= \begin{cases} - (\alpha(x_1),\alpha(x_2)) & \exists x_1,x_2, \sigma'(x_1,x_2)=w \\ - w & \mathsf{o.w} - \end{cases} + \inl(w,(x_1,x_2)) & \exists x_1,x_2, \sigma'(x_1,x_2)=w \\ + \inr w & \mathsf{o.w} + \end{cases}\\ + u(\inl w,(x_1,x_2))=(\alpha(x_1),\alpha(x_2))\\ + u(\inr w)=w \end{gather*} -Now, we want to prove an abstraction of this statement. First, we need to spell out what $\appr;(FR)^\dagger;\appr$ is. We define relation compositions with pullbacks, so we have the following diagram: +Now, we want to prove a more abstract version of this statement. First, we need to spell out what $\appr;(FR)^\dagger;\appr$ is. We define relation compositions with pullbacks, so we have the following diagram: \begin{equation*} \begin{tikzcd}[ampersand replacement=\&] {\appr;(FR)^\dagger;\appr} \& {\appr;(FR)^\dagger} \& {\appr} \& {FX} \\ @@ -1870,15 +1872,15 @@ Now, we want to prove an abstraction of this statement. First, we need to spell \arrow["{{{{{{{\varphi_1}}}}}}}", from=1-2, to=1-3] \arrow["{{{{{{{\varphi_2}}}}}}}", from=1-2, to=2-2] \arrow["\lrcorner"{anchor=center, pos=0.125}, draw=none, from=1-2, to=2-3] - \arrow["{{{{{{{i_1}}}}}}}", from=1-3, to=1-4] - \arrow["{{{{{{{i_2}}}}}}}", from=1-3, to=2-3] + \arrow["{{{{{{{q_1}}}}}}}", from=1-3, to=1-4] + \arrow["{{{{{{{q_2}}}}}}}", from=1-3, to=2-3] \arrow["{{{{{{{Fp_1^\dagger}}}}}}}", from=2-2, to=2-3] \arrow["{{{{{{{Fp_2^\dagger}}}}}}}"', from=2-2, to=3-2] - \arrow["{{{{{{{i_1}}}}}}}"', from=3-1, to=3-2] - \arrow["{{{{{{{i_2}}}}}}}"', from=3-1, to=4-1] + \arrow["{{{{{{{q_1}}}}}}}"', from=3-1, to=3-2] + \arrow["{{{{{{{q_2}}}}}}}"', from=3-1, to=4-1] \end{tikzcd} \end{equation*} -Additionally, we make the abbreviations that ${Fp_1}_\appr=i_1\comp\varphi_1\comp\pi_1$ and ${Fp_2}_\appr=i_2\comp\pi_2$. +Additionally, we make the abbreviations that ${Fp_1}_\appr=q_1\comp\varphi_1\comp\pi_1$ and ${Fp_2}_\appr=q_2\comp\pi_2$. \begin{prop} Assuming we have a morphism $\sigma'\c R\to(FR)^\dagger$ then exists $\delta\c(FR)^\dagger\to(\appr;(FR)^\dagger;\appr)^\dagger$ such that $\sigma=\delta\comp\sigma'$ that commutes in the following diagram: \begin{equation*}