Alexandroff P. Elementary Concepts of Topology

Dover Publications, 1961. — 57 pages. — ISBN: 048660747X OCR.
Concise work presents topological concepts in clear, elementary fashion without sacrificing their profundity or exactness. Author proceeds from basics of set-theoretic topology, through topological theorems and questions based on concept of the algebraic complex, to the concept of Betti groups.Polyhedra, Manifolds, Topological Spaces.
Algebraic Complexes.
Simplicial Mappings and Invariance Theorems.