\(\Delta\)-sets. I: Homotopy theory. (English) Zbl 0226.55019
MSC:
55U35 | Abstract and axiomatic homotopy theory in algebraic topology |
55U10 | Simplicial sets and complexes in algebraic topology |
55U15 | Chain complexes in algebraic topology |
55U40 | Topological categories, foundations of homotopy theory |