typos

introduction.tex

@@ -384,7 +384,7 @@ for the category of (strict) $\oo$\nbd{}categories.
   of its polygraphic homology in the first place. From this observation, it is
   tempting to make the following conjecture:
   \begin{center}
-    The weak polygraphic homology of a (strict) $\oo$\nbd{}category coincide
+    The weak polygraphic homology of a (strict) $\oo$\nbd{}category coincides
     with its singular homology.
   \end{center}
   In other words, we conjecture that the fact that polygraphic and singular