Homology (mathematics) - History

History

Homology classes were first defined rigorously by Henri Poincaré in his seminal paper "Analysis situs", J. Ecole polytech. (2) 1. 1–121 (1895).

The homology group was further developed by Emmy Noether and, independently, by Leopold Vietoris and Walther Mayer, in the period 1925–28. Prior to this, topological classes in combinatorial topology were not formally considered as abelian groups. The spread of homology groups marked the change of terminology and viewpoint from "combinatorial topology" to "algebraic topology".

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