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$\Newextarrow{\xRightarrow}{5,5}{0x21D2}$ $\newcommand\empty{}$
$\Newextarrow{\xhookrightarrow}{10,10}{0x21AA}$

Comments on Proposition 1.5.3.3

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Comment #1259 by Alf on

Why is "the map ρ is given on n-simplices by the composition"? A priori this could be another map. How do you immediately see that this is the same map? I tried to check that these maps are the same, but it ends up in a tedious calculation.

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