Proceedings of the American Mathematical Society

Contents of Volume 109, Number 1
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Matrix generation of Pythagorean $n$-tuples

Daniel Cass and Pasquale J. Arpaia

Proc. Amer. Math. Soc. 109 (1990), 1-7

DOI: https://doi.org/10.1090/S0002-9939-1990-1000148-0

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Filtrations of rational representations of reductive groups of semisimple rank $1$

Stephen Doty

Proc. Amer. Math. Soc. 109 (1990), 9-22

DOI: https://doi.org/10.1090/S0002-9939-1990-1000153-4

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On the number of self-dual bases of $\textrm {GF}(q^ m)$ over $\textrm {GF}(q)$

Dieter Jungnickel, Alfred J. Menezes and Scott A. Vanstone

Proc. Amer. Math. Soc. 109 (1990), 23-29

DOI: https://doi.org/10.1090/S0002-9939-1990-1007501-X

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On the smoothed Toeplitz extensions and $K$-theory

Ronghui Ji

Proc. Amer. Math. Soc. 109 (1990), 31-38

DOI: https://doi.org/10.1090/S0002-9939-1990-1002159-8

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PI semigroup algebras of linear semigroups

Jan Okniński and Mohan S. Putcha

Proc. Amer. Math. Soc. 109 (1990), 39-46

DOI: https://doi.org/10.1090/S0002-9939-1990-1013977-4

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Commuting and centralizing mappings in prime rings

J. Vukman

Proc. Amer. Math. Soc. 109 (1990), 47-52

DOI: https://doi.org/10.1090/S0002-9939-1990-1007517-3

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Rationality of some genus $0$ extensions of $K(X)$

James K. Deveney and Joe Yanik

Proc. Amer. Math. Soc. 109 (1990), 53-58

DOI: https://doi.org/10.1090/S0002-9939-1990-1007494-5

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Notes on the Baumslag-Solitar non-residually finite examples

Robert I. Campbell

Proc. Amer. Math. Soc. 109 (1990), 59-62

DOI: https://doi.org/10.1090/S0002-9939-1990-1012925-0

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Betti numbers for modules of finite length

Hara Charalambous, E. Graham Evans and Matthew Miller

Proc. Amer. Math. Soc. 109 (1990), 63-70

DOI: https://doi.org/10.1090/S0002-9939-1990-1013967-1

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$\mathcal {C}_1$ is uniformly Kadec-Klee

Chris Lennard

Proc. Amer. Math. Soc. 109 (1990), 71-77

DOI: https://doi.org/10.1090/S0002-9939-1990-0943795-4

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A linearization of the circular maximal operator

Daniel M. Oberlin

Proc. Amer. Math. Soc. 109 (1990), 79-84

DOI: https://doi.org/10.1090/S0002-9939-1990-1000165-0

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Hardy inequalities

Andreas Wannebo

Proc. Amer. Math. Soc. 109 (1990), 85-95

DOI: https://doi.org/10.1090/S0002-9939-1990-1010807-1

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Stable unit balls in Orlicz spaces

Antonio Suárez Granero

Proc. Amer. Math. Soc. 109 (1990), 97-104

DOI: https://doi.org/10.1090/S0002-9939-1990-1000154-6

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The existence of absolutely continuous invariant measures for $C^ {1+\epsilon }$ Jablonski transformation in $\textbf {R}^ n$

You-Shi Lou

Proc. Amer. Math. Soc. 109 (1990), 105-112

DOI: https://doi.org/10.1090/S0002-9939-1990-1004420-X

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Properties on the unit circle of polynomials with unimodular coefficients

Donald J. Newman and André Giroux

Proc. Amer. Math. Soc. 109 (1990), 113-116

DOI: https://doi.org/10.1090/S0002-9939-1990-1000163-7

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On the characterization of $H^ p(\textbf {R}^ n)$ in terms of Fourier multipliers

Akihito Uchiyama

Proc. Amer. Math. Soc. 109 (1990), 117-123

DOI: https://doi.org/10.1090/S0002-9939-1990-1007515-X

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Copies of $l_ \infty$ in $L^ p(\mu ;X)$

José Mendoza

Proc. Amer. Math. Soc. 109 (1990), 125-127

DOI: https://doi.org/10.1090/S0002-9939-1990-1012935-3

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Convolution in the harmonic Hardy class $h^ p$ with $0<p<1$

Miroslav Pavlović

Proc. Amer. Math. Soc. 109 (1990), 129-134

DOI: https://doi.org/10.1090/S0002-9939-1990-1012937-7

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Norms of positive operators on $L^ p$-spaces

Ralph Howard and Anton R. Schep

Proc. Amer. Math. Soc. 109 (1990), 135-146

DOI: https://doi.org/10.1090/S0002-9939-1990-1000156-X

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Principal eigenvalues for problems with indefinite weight function on $\textbf {R}^ n$

K. J. Brown, C. Cosner and J. Fleckinger

Proc. Amer. Math. Soc. 109 (1990), 147-155

DOI: https://doi.org/10.1090/S0002-9939-1990-1007489-1

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On the equation $\textrm {div} (\vert \nabla u\vert ^ {p-2}\nabla u)+\lambda \vert u\vert ^ {p-2}u=0$

Peter Lindqvist

Proc. Amer. Math. Soc. 109 (1990), 157-164

DOI: https://doi.org/10.1090/S0002-9939-1990-1007505-7

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On the theorem of Frullani

Juan Arias-de-Reyna

Proc. Amer. Math. Soc. 109 (1990), 165-175

DOI: https://doi.org/10.1090/S0002-9939-1990-1007485-4

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On eigenvalue problems of $p$-Laplacian with Neumann boundary conditions

Yin Xi Huang

Proc. Amer. Math. Soc. 109 (1990), 177-184

DOI: https://doi.org/10.1090/S0002-9939-1990-1010800-9

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A note on exponential integrability and pointwise estimates of Littlewood-Paley functions

Mark Leckband

Proc. Amer. Math. Soc. 109 (1990), 185-194

DOI: https://doi.org/10.1090/S0002-9939-1990-1007504-5

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Locally efficient monotone operators

Andrei Verona and Maria Elena Verona

Proc. Amer. Math. Soc. 109 (1990), 195-204

DOI: https://doi.org/10.1090/S0002-9939-1990-1012939-0

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On closed twisted curves

Sueli I. Rodrigues Costa

Proc. Amer. Math. Soc. 109 (1990), 205-214

DOI: https://doi.org/10.1090/S0002-9939-1990-0993746-1

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On the sectional curvature of compact hypersurfaces

Leslie Coghlan and Yoe Itokawa

Proc. Amer. Math. Soc. 109 (1990), 215-221

DOI: https://doi.org/10.1090/S0002-9939-1990-1010797-1

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Maps between orbifolds

Masayuki Yamasaki

Proc. Amer. Math. Soc. 109 (1990), 223-232

DOI: https://doi.org/10.1090/S0002-9939-1990-1017853-2

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Restrictions of open mappings of continua

Witold D. Bula and E. D. Tymchatyn

Proc. Amer. Math. Soc. 109 (1990), 233-235

DOI: https://doi.org/10.1090/S0002-9939-1990-1013965-8

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First countability and local simple connectivity of one point unions

Katsuya Eda

Proc. Amer. Math. Soc. 109 (1990), 237-241

DOI: https://doi.org/10.1090/S0002-9939-1990-1013969-5

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Rotation sets of toral flows

John Franks and Michał Misiurewicz

Proc. Amer. Math. Soc. 109 (1990), 243-249

DOI: https://doi.org/10.1090/S0002-9939-1990-1021217-5

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Decreasing chains without lower bounds in the Rudin-Frolík order

Eva Butkovičová

Proc. Amer. Math. Soc. 109 (1990), 251-259

DOI: https://doi.org/10.1090/S0002-9939-1990-1007490-8

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Three cardinal functions similar to net weight

Roy A. Johnson, Eliza Wajch and Władysław Wilczyński

Proc. Amer. Math. Soc. 109 (1990), 261-268

DOI: https://doi.org/10.1090/S0002-9939-1990-1007500-8

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On Rhoades’ open questions

Shih-sen Chang and Qi Chun Zhong

Proc. Amer. Math. Soc. 109 (1990), 269-274

DOI: https://doi.org/10.1090/S0002-9939-1990-1007491-X

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Large compact separable spaces may all contain $\beta \textbf {N}$

Alan Dow

Proc. Amer. Math. Soc. 109 (1990), 275-279

DOI: https://doi.org/10.1090/S0002-9939-1990-1010799-5

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A partition theorem for $[0,1]$

H. J. Prömel and B. Voigt

Proc. Amer. Math. Soc. 109 (1990), 281-285

DOI: https://doi.org/10.1090/S0002-9939-1990-1007509-4

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