Mayer, Walther The duality theory and the basic isomorphisms of group systems and nets and co-nets of group systems. (English) Zbl 0061.04801 Ann. Math. (2) 46, 1-28 (1945). Reviewer: A. Komatu Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 1 Review MSC: 20-XX Group theory and generalizations Keywords:group system; countable set of abelian groups; boundary operator; homology groups; duality theorems; Alexander duality; Poincaré-Pontryagin duality PDFBibTeX XMLCite \textit{W. Mayer}, Ann. Math. (2) 46, 1--28 (1945; Zbl 0061.04801) Full Text: DOI