mauroporta/Autour_de_DAG — pull request #15 by zhaoyan88 (2013-12-22 00:21:07+00:00)
Title: Rewriting of my chapter

I have made some changes to my chapter on Segal spaces, added some motivations, corrected some math and grammar, standardised notations and removed duplicates with Mauro's chapter on model categories. Also added some labels to chapters 1 and 2, and a new command in the root document.