Algebraic topology

Lefschetz S.

Table of contents :
Endmatter……Page 0
1. Homology theory: foundations and general properties……Page 1
2. Relations between connectedness and homology……Page 14
3. Groups related to webs……Page 19
4. Groups related to the union and intersection of two sets……Page 23
5. The Vietoris homology theory for compacta……Page 28
6. Reduction of the Vietoris theory to the Cech theory……Page 30
7. Homology theories of Kurosch and of Alexander-Kolmogoroff……Page 35