Heegaard, P. Preliminary studies for a topological theory of the connectivity of algebraic surfaces. (Forstudier til en topologisk Teori for de algebraiske Fladers Sammenhang.) (Danish) JFM 29.0417.02 Kjöbenhavn. 104 S. \(8^\circ\) (1898). Cited in 9 Documents JFM Section:Achter Abschnitt. Reine, elementare und synthetische Geometrie. Kapitel 2. Continuitätsbetrachtungen (Analysis Situs, Topologie). × Cite Format Result Cite Review PDF