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Conformal Versus Topological Conjugacy of Automorphisms on Compact Riemann Surfaces

Conformal Versus Topological Conjugacy of Automorphisms on Compact Riemann Surfaces Abstract We produce a family of algebraic curves (closed Riemann surfaces) Sλ admitting two cyclic groups H1 and H2 of conformal automorphisms, which are topologically (but not conformally) conjugate and such that S / Hi is the Riemann sphere Ĉ. The relevance of this example is that it shows that the subvarieties of moduli space consisting of points parametrizing curves which occur as cyclic coverings (of a fixed topological type) of Ĉ need not be normal. 1991 Mathematics Subject Classification 14H10, 30F10. © London Mathematical Society http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Bulletin of the London Mathematical Society Oxford University Press

Conformal Versus Topological Conjugacy of Automorphisms on Compact Riemann Surfaces

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References (9)

Publisher
Oxford University Press
Copyright
© London Mathematical Society
ISSN
0024-6093
eISSN
1469-2120
DOI
10.1112/S0024609396002640
Publisher site
See Article on Publisher Site

Abstract

Abstract We produce a family of algebraic curves (closed Riemann surfaces) Sλ admitting two cyclic groups H1 and H2 of conformal automorphisms, which are topologically (but not conformally) conjugate and such that S / Hi is the Riemann sphere Ĉ. The relevance of this example is that it shows that the subvarieties of moduli space consisting of points parametrizing curves which occur as cyclic coverings (of a fixed topological type) of Ĉ need not be normal. 1991 Mathematics Subject Classification 14H10, 30F10. © London Mathematical Society

Journal

Bulletin of the London Mathematical SocietyOxford University Press

Published: May 1, 1997

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