Contents of Volume 20, Number 4

All articles in this issue are freely accessible.

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The module structure of a group action on a polynomial ring: A finiteness theorem

Dikran B. Karagueuzian and Peter Symonds.
J. Amer. Math. Soc. 20 (2007), 931-967
Abstract, references and article information
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MathSciNet review: 2328711

Edge coloring models and reflection positivity

Balázs Szegedy.
J. Amer. Math. Soc. 20 (2007), 969-988
Abstract, references and article information
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MathSciNet review: 2328712

An infinite dimensional affine nil algebra with finite Gelfand-Kirillov dimension

T. H. Lenagan and Agata Smoktunowicz.
J. Amer. Math. Soc. 20 (2007), 989-1001
Abstract, references and article information
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MathSciNet review: 2328713

Finite group extensions and the Atiyah conjecture

Peter Linnell and Thomas Schick.
J. Amer. Math. Soc. 20 (2007), 1003-1051
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MathSciNet review: 2328714

Lower bounds on volumes of hyperbolic Haken 3-manifolds

Ian Agol, Peter A. Storm and William P. Thurston; with an appendix by Nathan Dunfield.
J. Amer. Math. Soc. 20 (2007), 1053-1077
Abstract, references and article information
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MathSciNet review: 2328715

An algebro-geometric proof of Witten’s conjecture

M. E. Kazarian and S. K. Lando.
J. Amer. Math. Soc. 20 (2007), 1079-1089
Abstract, references and article information
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MathSciNet review: 2328716

On the uniqueness of the foliation of spheres of constant mean curvature in asymptotically flat 3-manifolds

Jie Qing and Gang Tian.
J. Amer. Math. Soc. 20 (2007), 1091-1110
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MathSciNet review: 2328717

Tropical discriminants

Alicia Dickenstein, Eva Maria Feichtner and Bernd Sturmfels.
J. Amer. Math. Soc. 20 (2007), 1111-1133
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MathSciNet review: 2328718

Rational points on compactifications of semi-simple groups

Joseph Shalika, Ramin Takloo-Bighash and Yuri Tschinkel.
J. Amer. Math. Soc. 20 (2007), 1135-1186
Abstract, references and article information
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MathSciNet review: 2328719