Contents of Volume 91, Number 2

All articles in this issue are freely accessible.

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Large highly powerful numbers are cubeful

C. B. Lacampagne and J. L. Selfridge.
Proc. Amer. Math. Soc. 91 (1984), 173-181
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MathSciNet review: 740165

Some intersection properties of the fibres of Springer’s resolution

James S. Wolper.
Proc. Amer. Math. Soc. 91 (1984), 182-188
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MathSciNet review: 740166

On free subsemigroups of skew fields

L. Makar-Limanov.
Proc. Amer. Math. Soc. 91 (1984), 189-191
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MathSciNet review: 740167

Generalizations of Taketa’s theorem on the solvability of $M$-groups

I. M. Isaacs.
Proc. Amer. Math. Soc. 91 (1984), 192-194
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MathSciNet review: 740168

Separable abelian groups as modules over their endomorphism rings

K. M. Rangaswamy.
Proc. Amer. Math. Soc. 91 (1984), 195-198
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MathSciNet review: 740169

The number of nonisomorphic Boolean subalgebras of a power set

Francisco J. Freniche.
Proc. Amer. Math. Soc. 91 (1984), 199-201
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MathSciNet review: 740170

Fréchet differentiation of convex functions in a Banach space with a separable dual

D. Preiss and L. Zajíček.
Proc. Amer. Math. Soc. 91 (1984), 202-204
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MathSciNet review: 740171

A Fatou theorem for solutions of the porous medium equation

Björn E. J. Dahlberg, Eugene B. Fabes and Carlos E. Kenig.
Proc. Amer. Math. Soc. 91 (1984), 205-212
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MathSciNet review: 740172

Weighted norm inequalities for the Hardy-Littlewood maximal operator on spaces of homogeneous type

Hugo Aimar and Roberto A. Macías.
Proc. Amer. Math. Soc. 91 (1984), 213-216
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MathSciNet review: 740173

On boundedness of composition operators on $H^{2}(B_{2})$

Joseph A. Cima, Charles S. Stanton and Warren R. Wogen.
Proc. Amer. Math. Soc. 91 (1984), 217-222
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MathSciNet review: 740174

The Carathéodory distance does not define the topology

Jean-Pierre Vigué.
Proc. Amer. Math. Soc. 91 (1984), 223-224
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MathSciNet review: 740175

Equivariant triviality theorems for Hilbert $C^{∗} $-modules

J. A. Mingo and W. J. Phillips.
Proc. Amer. Math. Soc. 91 (1984), 225-230
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MathSciNet review: 740176

A property of compact operators

Herbert Kamowitz.
Proc. Amer. Math. Soc. 91 (1984), 231-236
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MathSciNet review: 740177

Fine and nontangential convergence on an NTA domain

J. C. Taylor.
Proc. Amer. Math. Soc. 91 (1984), 237-244
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MathSciNet review: 740178

Newton’s method and symbolic dynamics

Sherman Wong.
Proc. Amer. Math. Soc. 91 (1984), 245-253
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MathSciNet review: 740179

Dunford-Pettis operators and weak Radon-Nikodým sets

Lawrence H. Riddle.
Proc. Amer. Math. Soc. 91 (1984), 254-256
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MathSciNet review: 740180

Image areas and $H_{2}$ norms of analytic functions

Shōji Kobayashi.
Proc. Amer. Math. Soc. 91 (1984), 257-261
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MathSciNet review: 740181

Ornstein’s $Llog^{+}L$ theorem

Roger L. Jones.
Proc. Amer. Math. Soc. 91 (1984), 262-264
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MathSciNet review: 740182

Points extrémaux dans le dual de $L^{1}(𝜇,E)$

Michel Talagrand.
Proc. Amer. Math. Soc. 91 (1984), 265-269
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MathSciNet review: 740183

On means with countably additive continuities

Lester E. Dubins and David Heath.
Proc. Amer. Math. Soc. 91 (1984), 270-274
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MathSciNet review: 740184

A boundary value problem for symmetric elliptic systems of first order semilinear partial differential equations in open sets of class $C^{1}$

R. Selvaggi and I. Sisto.
Proc. Amer. Math. Soc. 91 (1984), 275-280
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MathSciNet review: 740185

An integral mean estimate for polynomials

M. A. Malik.
Proc. Amer. Math. Soc. 91 (1984), 281-284
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MathSciNet review: 740186

A fundamental inequality in the convolution of $L_{2}$ functions on the half line

Saburou Saitoh.
Proc. Amer. Math. Soc. 91 (1984), 285-286
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MathSciNet review: 740187

Naturally reductive metrics of nonpositive Ricci curvature

Carolyn Gordon and Wolfgang Ziller.
Proc. Amer. Math. Soc. 91 (1984), 287-290
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MathSciNet review: 740188

A uniformly, extremely nonextensional formula of arithmetic with many undecidable fixed points in many theories

Robert A. Di Paola.
Proc. Amer. Math. Soc. 91 (1984), 291-297
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MathSciNet review: 740189

Densities and differentiability properties of Gauss semigroups on a Lie group

Eberhard Siebert.
Proc. Amer. Math. Soc. 91 (1984), 298-305
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MathSciNet review: 740190

The Helson-Sarason-Szegő theorem and the Abel summability of the series for the predictor

Mohsen Pourahmadi.
Proc. Amer. Math. Soc. 91 (1984), 306-308
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MathSciNet review: 740191

The Evens-Kahn formula for the total Stiefel-Whitney class

Andrzej Kozlowski.
Proc. Amer. Math. Soc. 91 (1984), 309-313
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MathSciNet review: 740192

$3$-manifolds which contain nonparallel projective planes

Tsuyoshi Kobayashi.
Proc. Amer. Math. Soc. 91 (1984), 314-318
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MathSciNet review: 740193

A nonlocally connected continuum $X$ such that $C(X)$ is a retract of $2^{X}$

Jack T. Goodykoontz.
Proc. Amer. Math. Soc. 91 (1984), 319-322
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MathSciNet review: 740194

Surgery up to homotopy equivalence for nonpositively curved manifolds

A. Nicas and C. Stark.
Proc. Amer. Math. Soc. 91 (1984), 323-325
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MathSciNet review: 740195

On the differentiability of functions in $R^{n}$

R. A. DeVore and R. C. Sharpley.
Proc. Amer. Math. Soc. 91 (1984), 326-328
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MathSciNet review: 740196

Erratum: “Measure-theoretic quantifiers and Haar measure” [Proc. Amer. Math. Soc. 86 (1982) no. 1, 67–70; MR0663868 (83i:43001)]

Russell Lyons.
Proc. Amer. Math. Soc. 91 (1984), 329-330
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MathSciNet review: 740197