Radical relations in unitary, symplectic, and orthogonal groups.
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Erich W. Ellers (1979)
Journal für die reine und angewandte Mathematik
Douglas L. Costa, Gordon E. Keller (1992)
Journal für die reine und angewandte Mathematik
Rolf-Dieter Wirsching (1973)
Journal für die reine und angewandte Mathematik
M.E. Alonso, M.F. Roy (1987)
Mathematische Zeitschrift
Daniel R. Grayson (1984)
Commentarii mathematici Helvetici
Daniel R. Grayson (1986)
Commentarii mathematici Helvetici
G. PAZDERSKI (1980)
Beiträge zur Algebra und Geometrie = Contributions to algebra and geometry
Ignacio C. Garijo (2006)
Revista Matemática Complutense
If G is a group of automorphisms that acts properly discontinuously on a Riemann or Klein surface X, then there exists a unique structure of Riemann or Klein surface on X/G such that the projection π: X → X/G is a morphism. The analogous result is not true when we deal with surfaces with nodes. In this paper we give a new definition of a group that acts properly discontinuously on a surface with nodes in order to obtain a similar theorem.
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