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)

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Contents of Volume 122, Number 4
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Idempotents in matrix rings
Christopher Barnett and Victor Camillo
Proc. Amer. Math. Soc. 122 (1994), 965-969
DOI: https://doi.org/10.1090/S0002-9939-1994-1246513-1
On the Jacobian of the Klein curve
Despina T. Prapavessi
Proc. Amer. Math. Soc. 122 (1994), 971-978
DOI: https://doi.org/10.1090/S0002-9939-1994-1212286-1
One-sided ideals and derivations of prime rings
Matej Brešar
Proc. Amer. Math. Soc. 122 (1994), 979-983
DOI: https://doi.org/10.1090/S0002-9939-1994-1205483-2
The existence of flat covers
Richard Belshoff, Edgar E. Enochs and Jin Zhong Xu
Proc. Amer. Math. Soc. 122 (1994), 985-991
DOI: https://doi.org/10.1090/S0002-9939-1994-1209416-4
On Minakshisundaram-Pleijel zeta functions of spheres
E. Carletti and G. Monti Bragadin
Proc. Amer. Math. Soc. 122 (1994), 993-1001
DOI: https://doi.org/10.1090/S0002-9939-1994-1249872-9
The existence of bounded infinite $D$Tr-orbits
Shi Ping Liu and Rainer Schulz
Proc. Amer. Math. Soc. 122 (1994), 1003-1005
DOI: https://doi.org/10.1090/S0002-9939-1994-1223516-4
Some more Mathieu group coverings in characteristic two
Shreeram S. Abhyankar and Ikkwon Yie
Proc. Amer. Math. Soc. 122 (1994), 1007-1014
DOI: https://doi.org/10.1090/S0002-9939-1994-1239794-1
Detecting negative curvature in groups via local conditions
Paul Shawcroft
Proc. Amer. Math. Soc. 122 (1994), 1015-1023
DOI: https://doi.org/10.1090/S0002-9939-1994-1249891-2
On the hyperbolicity and the Schottky property of complex spaces
Do Duc Thai
Proc. Amer. Math. Soc. 122 (1994), 1025-1027
DOI: https://doi.org/10.1090/S0002-9939-1994-1232145-8
A converse of the volume-mean-value property for invariantly harmonic functions
Joaquim Bruna and Jacqueline Detraz
Proc. Amer. Math. Soc. 122 (1994), 1029-1034
DOI: https://doi.org/10.1090/S0002-9939-1994-1209418-8
$L^ p$-boundedness of the Hilbert transform and maximal function associated to flat plane curves
S. Ziesler
Proc. Amer. Math. Soc. 122 (1994), 1035-1043
DOI: https://doi.org/10.1090/S0002-9939-1994-1213872-5
Support theorems for Radon transforms on higher rank symmetric spaces
Fulton Gonzalez and Eric Todd Quinto
Proc. Amer. Math. Soc. 122 (1994), 1045-1052
DOI: https://doi.org/10.1090/S0002-9939-1994-1205492-3
Sums and products of cyclic operators
Pei Yuan Wu
Proc. Amer. Math. Soc. 122 (1994), 1053-1063
DOI: https://doi.org/10.1090/S0002-9939-1994-1203995-9
Spatiality of isomorphisms between certain reflexive algebras
M. S. Lambrou and W. E. Longstaff
Proc. Amer. Math. Soc. 122 (1994), 1065-1073
DOI: https://doi.org/10.1090/S0002-9939-1994-1216818-9
Mean value inequalities
F. H. Clarke and Yu. S. Ledyaev
Proc. Amer. Math. Soc. 122 (1994), 1075-1083
DOI: https://doi.org/10.1090/S0002-9939-1994-1212282-4
The Hankel transformation on $M’_ \mu$ and its representation
E. L. Koh and C. K. Li
Proc. Amer. Math. Soc. 122 (1994), 1085-1094
DOI: https://doi.org/10.1090/S0002-9939-1994-1207539-7
Locally uniformly continuous functions
Alexander J. Izzo
Proc. Amer. Math. Soc. 122 (1994), 1095-1100
DOI: https://doi.org/10.1090/S0002-9939-1994-1216816-5
On the modular equations of degree $3$
Li-Chien Shen
Proc. Amer. Math. Soc. 122 (1994), 1101-1114
DOI: https://doi.org/10.1090/S0002-9939-1994-1212287-3
A construction related to the cosine problem
Mihail N. Kolountzakis
Proc. Amer. Math. Soc. 122 (1994), 1115-1119
DOI: https://doi.org/10.1090/S0002-9939-1994-1243831-8
Ideals of operators strictly singular on subspaces
Michael J. Meyer
Proc. Amer. Math. Soc. 122 (1994), 1121-1123
DOI: https://doi.org/10.1090/S0002-9939-1994-1219729-8
On the $K$-groups of certain $C^ *$-algebras used in $E$-theory
Gabriel Nagy
Proc. Amer. Math. Soc. 122 (1994), 1125-1131
DOI: https://doi.org/10.1090/S0002-9939-1994-1209099-3
Crossed products by semigroups of endomorphisms and the Toeplitz algebras of ordered groups
Sriwulan Adji, Marcelo Laca, May Nilsen and Iain Raeburn
Proc. Amer. Math. Soc. 122 (1994), 1133-1141
DOI: https://doi.org/10.1090/S0002-9939-1994-1215024-1
On uniqueness sets for areally mean $p$-valent functions
Enrique Villamor
Proc. Amer. Math. Soc. 122 (1994), 1143-1151
DOI: https://doi.org/10.1090/S0002-9939-1994-1211592-4
Surfaces minimizing area plus length of singular curves
Frank Morgan
Proc. Amer. Math. Soc. 122 (1994), 1153-1161
DOI: https://doi.org/10.1090/S0002-9939-1994-1231039-1
Some estimates of Kobayashi metric in the normal direction
Siqi Fu
Proc. Amer. Math. Soc. 122 (1994), 1163-1169
DOI: https://doi.org/10.1090/S0002-9939-1994-1231034-2
A note on endomorphisms of irrational rotation $C^ *$-algebras
Kazunori Kodaka
Proc. Amer. Math. Soc. 122 (1994), 1171-1172
DOI: https://doi.org/10.1090/S0002-9939-1994-1211581-X
Pathwise connectivity of the spatial numerical range
Tofik Y. Kuliyev
Proc. Amer. Math. Soc. 122 (1994), 1173-1174
DOI: https://doi.org/10.1090/S0002-9939-1994-1211582-1
Fixed point theorem for nonexpansive semigroup on Banach space
Wataru Takahashi and Doo Hoan Jeong
Proc. Amer. Math. Soc. 122 (1994), 1175-1179
DOI: https://doi.org/10.1090/S0002-9939-1994-1223268-8
Hardy inequalities and imbeddings in domains generalizing $C^ {0,\lambda }$ domains
Andreas Wannebo
Proc. Amer. Math. Soc. 122 (1994), 1181-1190
DOI: https://doi.org/10.1090/S0002-9939-1994-1211593-6
An operator bound related to Feynman-Kac formulae
Brian Jefferies
Proc. Amer. Math. Soc. 122 (1994), 1191-1202
DOI: https://doi.org/10.1090/S0002-9939-1994-1212283-6
Hecke algebra on homogeneous trees and relations with Toeplitz and Hankel operators
Janusz Wysoczański
Proc. Amer. Math. Soc. 122 (1994), 1203-1210
DOI: https://doi.org/10.1090/S0002-9939-1994-1213871-3
Surfaces of constant mean curvature $1$ in $\textbf {H}^ 3$ and algebraic curves on a quadric
A. J. Small
Proc. Amer. Math. Soc. 122 (1994), 1211-1220
DOI: https://doi.org/10.1090/S0002-9939-1994-1209429-2
A note on discriminantal arrangements
Michael Falk
Proc. Amer. Math. Soc. 122 (1994), 1221-1227
DOI: https://doi.org/10.1090/S0002-9939-1994-1209098-1
Ricci tensors of real hypersurfaces in a complex projective space
Sadahiro Maeda
Proc. Amer. Math. Soc. 122 (1994), 1229-1235
DOI: https://doi.org/10.1090/S0002-9939-1994-1209425-5
Permutations and presentations
Peter Cholak and Rod Downey
Proc. Amer. Math. Soc. 122 (1994), 1237-1249
DOI: https://doi.org/10.1090/S0002-9939-1994-1209095-6
Bootstrap sample size in nonregular cases
Jun Shao
Proc. Amer. Math. Soc. 122 (1994), 1251-1262
DOI: https://doi.org/10.1090/S0002-9939-1994-1227529-8
Bias and variance reduction in estimation of model dimension
Wei-Yin Loh and Xiaodong Zheng
Proc. Amer. Math. Soc. 122 (1994), 1263-1272
DOI: https://doi.org/10.1090/S0002-9939-1994-1211583-3
Wandering domains for infinitely renormalizable diffeomorphisms of the disk
Christian Bonatti, Jean-Marc Gambaudo, Jean-Marie Lion and Charles Tresser
Proc. Amer. Math. Soc. 122 (1994), 1273-1278
DOI: https://doi.org/10.1090/S0002-9939-1994-1223264-0
Profinite groups with restricted centralizers
Aner Shalev
Proc. Amer. Math. Soc. 122 (1994), 1279-1284
DOI: https://doi.org/10.1090/S0002-9939-1994-1239805-3
Two-generator cable knots are tunnel one
Steven A. Bleiler
Proc. Amer. Math. Soc. 122 (1994), 1285-1287
DOI: https://doi.org/10.1090/S0002-9939-1994-1242075-3
All autohomeomorphisms of connected Menger manifolds are stable
Katsuro Sakai
Proc. Amer. Math. Soc. 122 (1994), 1289-1291
DOI: https://doi.org/10.1090/S0002-9939-1994-1273522-9