%0 Journal Article %T Mapping spaces in Quasi-categories %A Daniel Dugger %A David I. Spivak %J Mathematics %D 2009 %I arXiv %R 10.2140/agt.2011.11.263 %X We apply the Dwyer-Kan theory of homotopy function complexes in model categories to the study of mapping spaces in quasi-categories. Using this, together with our work on rigidification from [DS1], we give a streamlined proof of the Quillen equivalence between quasi-categories and simplicial categories. Some useful material about relative mapping spaces in quasi-categories is developed along the way. %U http://arxiv.org/abs/0911.0469v1