# Kerodon

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

Go back to the page of Subsection 3.4.4.

Comment #1133 by Carles Sáez on

At the third point of the proof, why can we assume that $f_{ \overline{A} \overline{C}}$ is a monomorphism after replacing $\overline{A}$ by the fiber product $A \times _{C} \overline{C}$?

Comment #1134 by Kerodon on

Corrected; the second step should be omitted.

There are also:

• 5 comment(s) on Chapter 3: Kan Complexes
• 4 comment(s) on Section 3.4: Homotopy Pullback and Homotopy Pushout Squares

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