%0 Journal Article %T An elementary illustrated introduction to simplicial sets %A Greg Friedman %J Mathematics %D 2008 %I arXiv %X This is an expository introduction to simplicial sets and simplicial homotopy theory with particular focus on relating the combinatorial aspects of the theory to their geometric/topological origins. It is intended to be accessible to students familiar with just the fundamentals of algebraic topology. %U http://arxiv.org/abs/0809.4221v4