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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 99, Number 2
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Perfect congruences on a free monoid
Mario Petrich and C. M. Reis
Proc. Amer. Math. Soc. 99 (1987), 205-212
DOI: https://doi.org/10.1090/S0002-9939-1987-0870772-4
On the number of squares in a group
Ludomir Newelski
Proc. Amer. Math. Soc. 99 (1987), 213-218
DOI: https://doi.org/10.1090/S0002-9939-1987-0870773-6
Additive groups of $T$-rings
George V. Wilson
Proc. Amer. Math. Soc. 99 (1987), 219-220
DOI: https://doi.org/10.1090/S0002-9939-1987-0870774-8
Covering étendues and Freyd’s theorem
Kimmo I. Rosenthal
Proc. Amer. Math. Soc. 99 (1987), 221-222
DOI: https://doi.org/10.1090/S0002-9939-1987-0870775-X
On the average number of groups of square-free order
Carl Pomerance
Proc. Amer. Math. Soc. 99 (1987), 223-231
DOI: https://doi.org/10.1090/S0002-9939-1987-0870776-1
Approximate identities and paracompactness
R. A. Fontenot and R. F. Wheeler
Proc. Amer. Math. Soc. 99 (1987), 232-236
DOI: https://doi.org/10.1090/S0002-9939-1987-0870777-3
On an eigenvalue problem of Ahmad and Lazer for ordinary differential equations
Marcellino Gaudenzi
Proc. Amer. Math. Soc. 99 (1987), 237-243
DOI: https://doi.org/10.1090/S0002-9939-1987-0870778-5
Weak spectral synthesis
C. Robert Warner
Proc. Amer. Math. Soc. 99 (1987), 244-248
DOI: https://doi.org/10.1090/S0002-9939-1987-0870779-7
On the identity $L(E,F)=LB(E,F)$ for pairs of locally convex spaces $E$ and $F$
José Bonet
Proc. Amer. Math. Soc. 99 (1987), 249-255
DOI: https://doi.org/10.1090/S0002-9939-1987-0870780-3
Arcangeli’s method for Fredholm equations of the first kind
C. W. Groetsch and J. Guacaneme
Proc. Amer. Math. Soc. 99 (1987), 256-260
DOI: https://doi.org/10.1090/S0002-9939-1987-0870781-5
The Oseledec and Sacker-Sell spectra for almost periodic linear systems: an example
Russell A. Johnson
Proc. Amer. Math. Soc. 99 (1987), 261-267
DOI: https://doi.org/10.1090/S0002-9939-1987-0870782-7
Invariant subspaces for operators in subalgebras of $L^ \infty (\mu )$
Tavan T. Trent
Proc. Amer. Math. Soc. 99 (1987), 268-272
DOI: https://doi.org/10.1090/S0002-9939-1987-0870783-9
Jensen’s inequality for positive contractions on operator algebras
Dénes Petz
Proc. Amer. Math. Soc. 99 (1987), 273-277
DOI: https://doi.org/10.1090/S0002-9939-1987-0870784-0
A counterexample to a problem on points of continuity in Banach spaces
N. Ghoussoub, B. Maurey and W. Schachermayer
Proc. Amer. Math. Soc. 99 (1987), 278-282
DOI: https://doi.org/10.1090/S0002-9939-1987-0870785-2
Iterative approximation of fixed points of Lipschitzian strictly pseudocontractive mappings
C. E. Chidume
Proc. Amer. Math. Soc. 99 (1987), 283-288
DOI: https://doi.org/10.1090/S0002-9939-1987-0870786-4
Continuity of derivations on some semiprime Banach algebra
Ramesh V. Garimella
Proc. Amer. Math. Soc. 99 (1987), 289-292
DOI: https://doi.org/10.1090/S0002-9939-1987-0870787-6
Concerning polynomials on the unit interval
Q. M. Tariq
Proc. Amer. Math. Soc. 99 (1987), 293-296
DOI: https://doi.org/10.1090/S0002-9939-1987-0870788-8
A generalization of Lyapounov’s convexity theorem to measures with atoms
John Elton and Theodore P. Hill
Proc. Amer. Math. Soc. 99 (1987), 297-304
DOI: https://doi.org/10.1090/S0002-9939-1987-0870789-X
Radon’s problem for some surfaces in $\textbf {R}^ n$
A. M. Cormack
Proc. Amer. Math. Soc. 99 (1987), 305-312
DOI: https://doi.org/10.1090/S0002-9939-1987-0870790-6
The mean curvature of a set of finite perimeter
Elisabetta Barozzi, Eduardo Gonzalez and Italo Tamanini
Proc. Amer. Math. Soc. 99 (1987), 313-316
DOI: https://doi.org/10.1090/S0002-9939-1987-0870791-8
Spectra of the difference and product of projections
Matjaž Omladič
Proc. Amer. Math. Soc. 99 (1987), 317-318
DOI: https://doi.org/10.1090/S0002-9939-1987-0870792-X
Removable sets of support points of convex sets in Banach spaces
R. R. Phelps
Proc. Amer. Math. Soc. 99 (1987), 319-322
DOI: https://doi.org/10.1090/S0002-9939-1987-0870793-1
A maximum principle for quotient norms in $H^ \infty$
Eric Hayashi
Proc. Amer. Math. Soc. 99 (1987), 323-327
DOI: https://doi.org/10.1090/S0002-9939-1987-0870794-3
Regular boundary elements
Robin Harte
Proc. Amer. Math. Soc. 99 (1987), 328-330
DOI: https://doi.org/10.1090/S0002-9939-1987-0870795-5
Continuous functions on multipolar sets
Ramasamy Jesuraj
Proc. Amer. Math. Soc. 99 (1987), 331-339
DOI: https://doi.org/10.1090/S0002-9939-1987-0870796-7
Extremal multilinear forms on Banach spaces
I. Sarantopoulos
Proc. Amer. Math. Soc. 99 (1987), 340-346
DOI: https://doi.org/10.1090/S0002-9939-1987-0870797-9
A symbolic calculus for analytic Carleman classes
Jamil A. Siddiqi and Mostéfa Ider
Proc. Amer. Math. Soc. 99 (1987), 347-350
DOI: https://doi.org/10.1090/S0002-9939-1987-0870798-0
Weak sequential denseness in Banach spaces
J. Howard
Proc. Amer. Math. Soc. 99 (1987), 351-352
DOI: https://doi.org/10.1090/S0002-9939-1987-0870799-2
Uniqueness of positive solutions of the heat equation
Harold Donnelly
Proc. Amer. Math. Soc. 99 (1987), 353-356
DOI: https://doi.org/10.1090/S0002-9939-1987-0870800-6
Metrics of negative curvature on vector bundles
Michael T. Anderson
Proc. Amer. Math. Soc. 99 (1987), 357-363
DOI: https://doi.org/10.1090/S0002-9939-1987-0870801-8
An undecidability result for power series rings of positive characteristic
Thanases Pheidas
Proc. Amer. Math. Soc. 99 (1987), 364-366
DOI: https://doi.org/10.1090/S0002-9939-1987-0870802-X
A differentially algebraic replacement theorem, and analog computability
Leonard Lipshitz and Lee A. Rubel
Proc. Amer. Math. Soc. 99 (1987), 367-372
DOI: https://doi.org/10.1090/S0002-9939-1987-0870803-1
On the free genus of knots
Yoav Moriah
Proc. Amer. Math. Soc. 99 (1987), 373-379
DOI: https://doi.org/10.1090/S0002-9939-1987-0870804-3
$\textrm {Pin}^ c$ cobordism and equivariant $\textrm {Spin}^ c$ cobordism of cyclic $2$-groups
Anthony Bahri and Peter Gilkey
Proc. Amer. Math. Soc. 99 (1987), 380-382
DOI: https://doi.org/10.1090/S0002-9939-1987-0870805-5
Minimal surfaces in manifolds with $S^ 1$ actions and the simple loop conjecture for Seifert fibered spaces
Joel Hass
Proc. Amer. Math. Soc. 99 (1987), 383-388
DOI: https://doi.org/10.1090/S0002-9939-1987-0870806-7
Maximal compact normal subgroups
M. R. Peyrovian
Proc. Amer. Math. Soc. 99 (1987), 389-394
DOI: https://doi.org/10.1090/S0002-9939-1987-0870807-9