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Proceedings of the American Mathematical Society

Published by the American Mathematical Society since 1950, Proceedings of the American Mathematical Society is devoted to shorter research articles in all areas of pure and applied mathematics.

ISSN 1088-6826 (online) ISSN 0002-9939 (print)

The 2024 MCQ for Proceedings of the American Mathematical Society is 0.85.

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Contents of Volume 81, Number 2
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Representations of Baer $\ast$-semigroups
Stanley P. Gudder and John R. Michel
Proc. Amer. Math. Soc. 81 (1981), 157-163
DOI: https://doi.org/10.1090/S0002-9939-1981-0593446-0
A limit on the Loewy length of the endomorphism ring of a module of finite length
Sverre O. Smalø
Proc. Amer. Math. Soc. 81 (1981), 164-166
DOI: https://doi.org/10.1090/S0002-9939-1981-0593447-2
Relations in hyperreflection groups
Erich W. Ellers
Proc. Amer. Math. Soc. 81 (1981), 167-171
DOI: https://doi.org/10.1090/S0002-9939-1981-0593448-4
Group rings whose torsion units form a subgroup
César Polcino Milies
Proc. Amer. Math. Soc. 81 (1981), 172-174
DOI: https://doi.org/10.1090/S0002-9939-1981-0593449-6
Flat and projective character modules
Thomas J. Cheatham and David R. Stone
Proc. Amer. Math. Soc. 81 (1981), 175-177
DOI: https://doi.org/10.1090/S0002-9939-1981-0593450-2
Intersections of pure subgroups in abelian groups
D. Boyer and K. M. Rangaswamy
Proc. Amer. Math. Soc. 81 (1981), 178-180
DOI: https://doi.org/10.1090/S0002-9939-1981-0593451-4
The restriction of Whittaker modules to certain parabolic subalgebras
Nolan R. Wallach
Proc. Amer. Math. Soc. 81 (1981), 181-188
DOI: https://doi.org/10.1090/S0002-9939-1981-0593452-6
Schur indices and the Galois group
Eugene Spiegel
Proc. Amer. Math. Soc. 81 (1981), 189-190
DOI: https://doi.org/10.1090/S0002-9939-1981-0593453-8
Groups of finite weight
A. H. Rhemtulla
Proc. Amer. Math. Soc. 81 (1981), 191-192
DOI: https://doi.org/10.1090/S0002-9939-1981-0593454-X
A counterexample to conjectures of Papakyriakopoulos and Swarup
James McCool
Proc. Amer. Math. Soc. 81 (1981), 193-194
DOI: https://doi.org/10.1090/S0002-9939-1981-0593455-1
A quick test for nonisomorphism of one-relator groups
K. J. Horadam
Proc. Amer. Math. Soc. 81 (1981), 195-200
DOI: https://doi.org/10.1090/S0002-9939-1981-0593456-3
On the limiting set of stochastic products $xA_{1}\cdots A_{k}$
D. J. Hartfiel
Proc. Amer. Math. Soc. 81 (1981), 201-206
DOI: https://doi.org/10.1090/S0002-9939-1981-0593457-5
Generalized cyclotomic periods
Ronald J. Evans
Proc. Amer. Math. Soc. 81 (1981), 207-212
DOI: https://doi.org/10.1090/S0002-9939-1981-0593458-7
Fixed subalgebra of a commutative Frobenius algebra
Gorô Azumaya
Proc. Amer. Math. Soc. 81 (1981), 213-216
DOI: https://doi.org/10.1090/S0002-9939-1981-0593459-9
A complex that resolves the ideal of minors having $n-1$ columns in common
J. F. Andrade and A. Simis
Proc. Amer. Math. Soc. 81 (1981), 217-219
DOI: https://doi.org/10.1090/S0002-9939-1981-0593460-5
A remark on bounded strictly plurisubharmonic exhaustion functions
R. Michael Range
Proc. Amer. Math. Soc. 81 (1981), 220-222
DOI: https://doi.org/10.1090/S0002-9939-1981-0593461-7
Multipliers of group algebras of vector-valued functions
U. B. Tewari, M. Dutta and D. P. Vaidya
Proc. Amer. Math. Soc. 81 (1981), 223-229
DOI: https://doi.org/10.1090/S0002-9939-1981-0593462-9
Composition operators isolated in the uniform operator topology
Earl Berkson
Proc. Amer. Math. Soc. 81 (1981), 230-232
DOI: https://doi.org/10.1090/S0002-9939-1981-0593463-0
Remarks on bimeasures
Igor Kluvánek
Proc. Amer. Math. Soc. 81 (1981), 233-239
DOI: https://doi.org/10.1090/S0002-9939-1981-0593464-2
An extension of the Fuglede-Putnam theorem to subnormal operators using a Hilbert-Schmidt norm inequality
Takayuki Furuta
Proc. Amer. Math. Soc. 81 (1981), 240-242
DOI: https://doi.org/10.1090/S0002-9939-1981-0593465-4
On subharmonicity of the capacity of the spectrum
Zbigniew Słodkowski
Proc. Amer. Math. Soc. 81 (1981), 243-249
DOI: https://doi.org/10.1090/S0002-9939-1981-0593466-6
Length estimates for holomorphic functions
Shinji Yamashita
Proc. Amer. Math. Soc. 81 (1981), 250-252
DOI: https://doi.org/10.1090/S0002-9939-1981-0593467-8
A nonlinear ergodic theorem for an amenable semigroup of nonexpansive mappings in a Hilbert space
Wataru Takahashi
Proc. Amer. Math. Soc. 81 (1981), 253-256
DOI: https://doi.org/10.1090/S0002-9939-1981-0593468-X
Asymptotic normal structure and fixed points of nonexpansive mappings
J.-B. Baillon and R. Schöneberg
Proc. Amer. Math. Soc. 81 (1981), 257-264
DOI: https://doi.org/10.1090/S0002-9939-1981-0593469-1
On the Dunford-Pettis property
J. Bourgain
Proc. Amer. Math. Soc. 81 (1981), 265-272
DOI: https://doi.org/10.1090/S0002-9939-1981-0593470-8
On the product of a Riesz set and a small $p$ set
Hiroshi Yamaguchi
Proc. Amer. Math. Soc. 81 (1981), 273-278
DOI: https://doi.org/10.1090/S0002-9939-1981-0593471-X
Stable summation methods for a class of singular Sturm-Liouville expansions
Harvey Diamond, Mark Kon and Louise Raphael
Proc. Amer. Math. Soc. 81 (1981), 279-286
DOI: https://doi.org/10.1090/S0002-9939-1981-0593472-1
Transformation of a class of nonselfadjoint eigenvalue problems
D. R. K. S. Rao and K. N. Murty
Proc. Amer. Math. Soc. 81 (1981), 287-292
DOI: https://doi.org/10.1090/S0002-9939-1981-0593473-3
Arens regularity and the algebra of double multipliers
B. J. Tomiuk
Proc. Amer. Math. Soc. 81 (1981), 293-298
DOI: https://doi.org/10.1090/S0002-9939-1981-0593474-5
$M$-ideals, the strong $2$-ball property and some renorming theorems
David Yost
Proc. Amer. Math. Soc. 81 (1981), 299-303
DOI: https://doi.org/10.1090/S0002-9939-1981-0593475-7
The first eigenvalue of the Laplacian for plane domains
Christopher B. Croke
Proc. Amer. Math. Soc. 81 (1981), 304-305
DOI: https://doi.org/10.1090/S0002-9939-1981-0593476-9
A remark on analytic sets with $\sigma$-compact sections
V. V. Srivatsa
Proc. Amer. Math. Soc. 81 (1981), 306-307
DOI: https://doi.org/10.1090/S0002-9939-1981-0593477-0
A stratifiable $k_{R}$-space which is not a $k$-space
Carlos R. Borges
Proc. Amer. Math. Soc. 81 (1981), 308-310
DOI: https://doi.org/10.1090/S0002-9939-1981-0593478-2
Scalar curvature of Lie groups
Hêng Lung Lai and Huei Shyong Lue
Proc. Amer. Math. Soc. 81 (1981), 311-315
DOI: https://doi.org/10.1090/S0002-9939-1981-0593479-4
A generalized pressing-down lemma and isocompactness
Brian M. Scott
Proc. Amer. Math. Soc. 81 (1981), 316-320
DOI: https://doi.org/10.1090/S0002-9939-1981-0593480-0
Characterization of the set-theoretical geometric realization in the non-Euclidean case
Carlos Ruiz Salguero and Roberto Ruiz Salguero
Proc. Amer. Math. Soc. 81 (1981), 321-324
DOI: https://doi.org/10.1090/S0002-9939-1981-0593481-2
Fixed point sets of $\textrm {LC}^{\infty }$, $C^{\infty }$ continua
John R. Martin
Proc. Amer. Math. Soc. 81 (1981), 325-328
DOI: https://doi.org/10.1090/S0002-9939-1981-0593482-4
Construction of spaces with a $\sigma$-minimal base
Dennis K. Burke
Proc. Amer. Math. Soc. 81 (1981), 329-332
DOI: https://doi.org/10.1090/S0002-9939-1981-0593483-6
Stability of periodic orbits in the theorem of Šarkovskii
Louis Block
Proc. Amer. Math. Soc. 81 (1981), 333-336
DOI: https://doi.org/10.1090/S0002-9939-1981-0593484-8
A countable $k$-space that is not stratifiable
L. Foged
Proc. Amer. Math. Soc. 81 (1981), 337-338
DOI: https://doi.org/10.1090/S0002-9939-1981-0593485-X
A remark on the multiplicity of the discrete spectrum of congruence groups
Burton Randol
Proc. Amer. Math. Soc. 81 (1981), 339-340
DOI: https://doi.org/10.1090/S0002-9939-1981-0593486-1
Another proof of Bianchi’s identity in Riemannian geometry
Jerry L. Kazdan
Proc. Amer. Math. Soc. 81 (1981), 341-342
DOI: https://doi.org/10.1090/S0002-9939-1981-0593487-3
The states associated with approximately inner automorphisms
Marie Choda
Proc. Amer. Math. Soc. 81 (1981), 343-344
DOI: https://doi.org/10.1090/S0002-9939-1981-0593488-5
The center of a convex set
Teck Cheong Lim
Proc. Amer. Math. Soc. 81 (1981), 345-346
DOI: https://doi.org/10.1090/S0002-9939-1981-0593489-7