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Proceedings of the American Mathematical Society
ISSN 1088-6826 (e) ISSN 0002-9939 (p)
     

Realizing alternating groups as monodromy groups of genus one covers

Author(s): Mike Fried; Eric Klassen; Yaacov Kopeliovich
Journal: Proc. Amer. Math. Soc. 129 (2001), 111-119.
MSC (1991): Primary 30F10
Posted: August 30, 2000
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Abstract:

We prove that if $n\geq 4$, a generic Riemann surface of genus 1 admits a meromorphic function (i.e., an analytic branched cover of $\mathbb{P}^{1}$) of degree $n$ such that every branch point has multiplicity $3$ and the monodromy group is the alternating group $A_{n}$. To prove this theorem, we construct a Hurwitz space and show that it maps (generically) onto the genus one moduli space.


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Fried, M., Alternating Groups and Lifting Invariants, preprint, 1999.

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Guralnick, R. and Neubauer, M., Recent developments in the inverse Galois problem, Cont. Math., vol.186, (1996), 325-352. MR 96c:00033

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Klassen, E. and Kopeliovich, Y., Hurwitz spaces and braid group representations (1997), preprint.

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Kneser, H., Die Deformatiofnssatze der einfach zusammenhangenden Flachen, Math. Zeit., vol. 25 (1926) 362-372.

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Additional Information:

Mike Fried
Affiliation: Department of Mathematics, University of California at Irvine, Irvine, California 92717
Email: mfried@math.uci.edu

Eric Klassen
Affiliation: Department of Mathematics, Florida State University, Tallahassee, Florida 32306
Email: klassen@math.fsu.edu

Yaacov Kopeliovich
Affiliation: Unigraphics Solutions, 100824 Hope St., Cypress, California 90630
Email: YKopeliovich@mail101.webango.com

DOI: 10.1090/S0002-9939-00-05736-1
PII: S 0002-9939(00)05736-1
Keywords: Riemann surface, monodromy group, Hurwitz space
Received by editor(s): March 8, 1999
Posted: August 30, 2000
Communicated by: Michael Stillman
Copyright of article: Copyright 2000, American Mathematical Society


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