Proceedings of the American Mathematical Society

Contents of Volume 105, Number 4
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The variety of pairs of matrices with rank$(AB-BA)\leq 1$

Michael G. Neubauer

Proc. Amer. Math. Soc. 105 (1989), 787-792

DOI: https://doi.org/10.1090/S0002-9939-1989-0931743-4

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On induced projective indecomposable modules

Peter Sin and Wolfgang Willems

Proc. Amer. Math. Soc. 105 (1989), 793-801

DOI: https://doi.org/10.1090/S0002-9939-1989-0938914-1

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Multiplicative subgroups of index three in a field

David B. Leep and Daniel B. Shapiro

Proc. Amer. Math. Soc. 105 (1989), 802-807

DOI: https://doi.org/10.1090/S0002-9939-1989-0963572-X

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Algebras of operators isomorphic to the circulant algebra

Alan C. Wilde

Proc. Amer. Math. Soc. 105 (1989), 808-816

DOI: https://doi.org/10.1090/S0002-9939-1989-0937854-1

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A dual to Baer’s lemma

Ulrich Albrecht and H. Pat Goeters

Proc. Amer. Math. Soc. 105 (1989), 817-826

DOI: https://doi.org/10.1090/S0002-9939-1989-0963569-X

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On the relationship between AP, RS and CEP

Keith A. Kearnes

Proc. Amer. Math. Soc. 105 (1989), 827-839

DOI: https://doi.org/10.1090/S0002-9939-1989-0952317-5

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Automorphism groups emitting local endomorphism near-rings

Gary L. Peterson

Proc. Amer. Math. Soc. 105 (1989), 840-843

DOI: https://doi.org/10.1090/S0002-9939-1989-0952320-5

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A sharp bound for solutions of linear Diophantine equations

I. Borosh, M. Flahive, D. Rubin and B. Treybig

Proc. Amer. Math. Soc. 105 (1989), 844-846

DOI: https://doi.org/10.1090/S0002-9939-1989-0955458-1

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The representation of a pair of integers by a pair of positive-definite binary quadratic forms

Kenneth Hardy, Pierre Kaplan and Kenneth S. Williams

Proc. Amer. Math. Soc. 105 (1989), 847-855

DOI: https://doi.org/10.1090/S0002-9939-1989-0960644-0

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Fixed points of automorphisms of compact Riemann surfaces and higher-order Weierstrass points

Ryutaro Horiuchi and Tomihiko Tanimoto

Proc. Amer. Math. Soc. 105 (1989), 856-860

DOI: https://doi.org/10.1090/S0002-9939-1989-0957265-2

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Characterizing when $R[X]$ is integrally closed

Thomas G. Lucas

Proc. Amer. Math. Soc. 105 (1989), 861-867

DOI: https://doi.org/10.1090/S0002-9939-1989-0942636-0

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Stable rank of some crossed product $C^ *$-algebras

Yiu Tung Poon

Proc. Amer. Math. Soc. 105 (1989), 868-875

DOI: https://doi.org/10.1090/S0002-9939-1989-0989097-3

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The Behnke-Stein theorem for open Riemann surfaces

R. R. Simha

Proc. Amer. Math. Soc. 105 (1989), 876-880

DOI: https://doi.org/10.1090/S0002-9939-1989-0953748-X

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The density of alternation points in rational approximation

P. B. Borwein, A. Kroó, R. Grothmann and E. B. Saff

Proc. Amer. Math. Soc. 105 (1989), 881-888

DOI: https://doi.org/10.1090/S0002-9939-1989-0948147-0

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Generalization of a result of Borwein and Ditor

Harry I. Miller

Proc. Amer. Math. Soc. 105 (1989), 889-893

DOI: https://doi.org/10.1090/S0002-9939-1989-0989098-5

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Hausdorff measures and sets of uniqueness for trigonometric series

R. Dougherty and A. S. Kechris

Proc. Amer. Math. Soc. 105 (1989), 894-897

DOI: https://doi.org/10.1090/S0002-9939-1989-0946633-0

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Algebras of holomorphic functions between $H^ p$ and $N_ *$

Nozomu Mochizuki

Proc. Amer. Math. Soc. 105 (1989), 898-902

DOI: https://doi.org/10.1090/S0002-9939-1989-0953744-2

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Sliding hump technique and spaces with the Wilansky property

Dominikus Noll and Wolfgang Stadler

Proc. Amer. Math. Soc. 105 (1989), 903-910

DOI: https://doi.org/10.1090/S0002-9939-1989-0989099-7

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On Kodaira vanishing for singular varieties

Donu Arapura and David B. Jaffe

Proc. Amer. Math. Soc. 105 (1989), 911-916

DOI: https://doi.org/10.1090/S0002-9939-1989-0952313-8

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Holomorphic mappings into strictly convex domains which are Kobayashi isometries at one point

Ian Graham

Proc. Amer. Math. Soc. 105 (1989), 917-921

DOI: https://doi.org/10.1090/S0002-9939-1989-0961406-0

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Approximating the invariant densities of transformations with infinitely many pieces on the interval

P. Góra and A. Boyarsky

Proc. Amer. Math. Soc. 105 (1989), 922-928

DOI: https://doi.org/10.1090/S0002-9939-1989-0953006-3

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Ultraproducts, $\epsilon$-multipliers, and isomorphisms

Michael Cambern and Krzysztof Jarosz

Proc. Amer. Math. Soc. 105 (1989), 929-937

DOI: https://doi.org/10.1090/S0002-9939-1989-0965240-7

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A remark on Radon-Nikodým properties of ordered Hilbert spaces

Lothar M. Schmitt

Proc. Amer. Math. Soc. 105 (1989), 938-940

DOI: https://doi.org/10.1090/S0002-9939-1989-0957266-4

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The spectral and Fredholm theory of extensions of bounded linear operators

Bruce A. Barnes

Proc. Amer. Math. Soc. 105 (1989), 941-949

DOI: https://doi.org/10.1090/S0002-9939-1989-0955454-4

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Pointwise multipliers of weighted BMO spaces

Steven Bloom

Proc. Amer. Math. Soc. 105 (1989), 950-960

DOI: https://doi.org/10.1090/S0002-9939-1989-0960640-3

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A note on the differential equations of Gleick-Lorenz

Morris W. Hirsch

Proc. Amer. Math. Soc. 105 (1989), 961-962

DOI: https://doi.org/10.1090/S0002-9939-1989-0955996-1

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Existence of nonnegative solutions of a semilinear equation at resonance with linear growth

Jairo Santanilla

Proc. Amer. Math. Soc. 105 (1989), 963-971

DOI: https://doi.org/10.1090/S0002-9939-1989-0964462-9

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The rank in homogeneous spaces of nonpositive curvature

María J. Druetta

Proc. Amer. Math. Soc. 105 (1989), 972-978

DOI: https://doi.org/10.1090/S0002-9939-1989-0946634-2

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A splitting theorem for complete manifolds with nonnegative curvature operator

Maria Helena Noronha

Proc. Amer. Math. Soc. 105 (1989), 979-985

DOI: https://doi.org/10.1090/S0002-9939-1989-0933519-0

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The rational homology of toric varieties is not a combinatorial invariant

Mark McConnell

Proc. Amer. Math. Soc. 105 (1989), 986-991

DOI: https://doi.org/10.1090/S0002-9939-1989-0954374-9

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Stability of surfaces with constant mean curvature

Hai Zhong Li

Proc. Amer. Math. Soc. 105 (1989), 992-997

DOI: https://doi.org/10.1090/S0002-9939-1989-0960643-9

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There’s no forcing a least upper bound

Robert S. Lubarsky

Proc. Amer. Math. Soc. 105 (1989), 998-1002

DOI: https://doi.org/10.1090/S0002-9939-1989-0943796-8

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An invariant of dichromatic links

Jim Hoste and Józef H. Przytycki

Proc. Amer. Math. Soc. 105 (1989), 1003-1007

DOI: https://doi.org/10.1090/S0002-9939-1989-0989100-0

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A combinatorial characterization of $S^ 3\times S^ 1$ among closed $4$-manifolds

Alberto Cavicchioli

Proc. Amer. Math. Soc. 105 (1989), 1008-1014

DOI: https://doi.org/10.1090/S0002-9939-1989-0931726-4

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Splitting of geodesics in homology classes

Steven Zelditch

Proc. Amer. Math. Soc. 105 (1989), 1015-1019

DOI: https://doi.org/10.1090/S0002-9939-1989-0946640-8

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A theorem on function spaces

Jan Baars, Joost de Groot and Jan van Mill

Proc. Amer. Math. Soc. 105 (1989), 1020-1024

DOI: https://doi.org/10.1090/S0002-9939-1989-0943792-0

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A simple proof of the uniqueness of periodic orbits in the $1:3$ resonance problem

Shui-Nee Chow, Cheng Zhi Li and Duo Wang

Proc. Amer. Math. Soc. 105 (1989), 1025-1032

DOI: https://doi.org/10.1090/S0002-9939-1989-0938908-6

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On hearing the shape of a triangle

Pei-Kun Chang and Dennis DeTurck

Proc. Amer. Math. Soc. 105 (1989), 1033-1038

DOI: https://doi.org/10.1090/S0002-9939-1989-0953738-7

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