Contents of Volume 81, Number 4

All articles in this issue are freely accessible.

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Some counterexamples concerning a differential criterion for flatness

William C. Brown and Sarah Glaz.
Proc. Amer. Math. Soc. 81 (1981), 505-510
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MathSciNet review: 601717

Simple subrings of algebras over fields

Jan Krempa.
Proc. Amer. Math. Soc. 81 (1981), 511-512
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MathSciNet review: 601718

A simple approach to the analytic continuation and values at negative integers for Riemann’s zeta function

David Goss.
Proc. Amer. Math. Soc. 81 (1981), 513-517
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MathSciNet review: 601719

Extension of a theorem of Gudder and Schelp to polynomials of orthomodular lattices

Ladislav Beran.
Proc. Amer. Math. Soc. 81 (1981), 518-520
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MathSciNet review: 601720

Neighborhoods of univalent functions

Stephan Ruscheweyh.
Proc. Amer. Math. Soc. 81 (1981), 521-527
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MathSciNet review: 601721

Flat Orlicz spaces

A. J. Pach, M. A. Smith and B. Turett.
Proc. Amer. Math. Soc. 81 (1981), 528-530
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MathSciNet review: 601722

Extreme values for the Sidon constant

Donald I. Cartwright, Robert B. Howlett and John R. McMullen.
Proc. Amer. Math. Soc. 81 (1981), 531-537
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MathSciNet review: 601723

On a problem of Lohwater about the asymptotic behaviour in Nevanlinna’s class

J. S. Hwang.
Proc. Amer. Math. Soc. 81 (1981), 538-540
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MathSciNet review: 601724

Essential numerical range in $B(l_{1})$

D. A. Legg and D. W. Townsend.
Proc. Amer. Math. Soc. 81 (1981), 541-545
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MathSciNet review: 601725

A note on continuous dependence of solutions of Volterra integral equations

Mats Gyllenberg.
Proc. Amer. Math. Soc. 81 (1981), 546-548
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MathSciNet review: 601726

Growth of polynomials with zeros outside a circle

Abdul Aziz and Q. G. Mohammad.
Proc. Amer. Math. Soc. 81 (1981), 549-553
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MathSciNet review: 601727

A geometric variant of Badé’s theorem on dominating measures

Mahlon M. Day.
Proc. Amer. Math. Soc. 81 (1981), 554-556
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MathSciNet review: 601728

The minimum of small entire functions

P. C. Fenton.
Proc. Amer. Math. Soc. 81 (1981), 557-561
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MathSciNet review: 601729

A counterexample for commutation in tensor products of $C^{∗} $-algebras

R. J. Archbold.
Proc. Amer. Math. Soc. 81 (1981), 562-564
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MathSciNet review: 601730

Point-spectrum of semibounded operator extensions

Palle E. T. Jørgensen.
Proc. Amer. Math. Soc. 81 (1981), 565-569
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MathSciNet review: 601731

Topological restrictions on double fibrations and Radon transforms

Eric Todd Quinto.
Proc. Amer. Math. Soc. 81 (1981), 570-574
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MathSciNet review: 601732

Levi flat hypersurfaces which are not holomorphically flat

Eric Bedford and Paolo De Bartolomeis.
Proc. Amer. Math. Soc. 81 (1981), 575-578
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MathSciNet review: 601733

A note on periodic solutions in the vicinity of a center

Bau Sen Du.
Proc. Amer. Math. Soc. 81 (1981), 579-584
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MathSciNet review: 601734

Spherical summability of differentiated multiple Fourier series

M. J. Kohn.
Proc. Amer. Math. Soc. 81 (1981), 585-590
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MathSciNet review: 601735

A note on the factorization of operator-valued functions

Takahiko Nakazi.
Proc. Amer. Math. Soc. 81 (1981), 591-594
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MathSciNet review: 601736

Almost compactness and decomposability of integral operators

Walter Schachermayer and Lutz Weis.
Proc. Amer. Math. Soc. 81 (1981), 595-599
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MathSciNet review: 601737

Integral characterizations and the theory of curves

Victor Dannon.
Proc. Amer. Math. Soc. 81 (1981), 600-602
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MathSciNet review: 601738

A characterization of totally geodesic hypersurfaces of $S^{n+1}$ and $CP^{n+1}$

Kinetsu Abe.
Proc. Amer. Math. Soc. 81 (1981), 603-606
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MathSciNet review: 601739

The partition property for certain extendible measures on supercompact cardinals

Donald H. Pelletier.
Proc. Amer. Math. Soc. 81 (1981), 607-612
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MathSciNet review: 601740

On universal null sets

E. Grzegorek and C. Ryll-Nardzewski.
Proc. Amer. Math. Soc. 81 (1981), 613-617
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MathSciNet review: 601741

Quadratic integration of Gaussian processes

T. F. Lin.
Proc. Amer. Math. Soc. 81 (1981), 618-623
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MathSciNet review: 601742

Finite Borel measures on spaces of cardinality less than $\mathfrak{c}$

R. J. Gardner and G. Gruenhage.
Proc. Amer. Math. Soc. 81 (1981), 624-628
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MathSciNet review: 601743

Transitivity and the $𝛾$-space conjecture in ordered spaces

Jacob Kofner.
Proc. Amer. Math. Soc. 81 (1981), 629-635
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MathSciNet review: 601744

Absolute $C^{∗} $-embedding of extremally disconnected spaces

Alan Dow.
Proc. Amer. Math. Soc. 81 (1981), 636-640
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MathSciNet review: 601745

Some products of topological spaces which are manifolds

Charles D. Bass.
Proc. Amer. Math. Soc. 81 (1981), 641-646
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MathSciNet review: 601746

Compactifications of symmetrizable spaces

D. K. Burke and S. W. Davis.
Proc. Amer. Math. Soc. 81 (1981), 647-651
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MathSciNet review: 601747

A regular space which is not completely regular

A. Mysior.
Proc. Amer. Math. Soc. 81 (1981), 652-653
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MathSciNet review: 601748

Generalizations of certain fundamental results on finite groups

Morton E. Harris and David A. Sibley.
Proc. Amer. Math. Soc. 81 (1981), 654-656
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MathSciNet review: 601749

Convexity of the dominant eigenvalue of an essentially nonnegative matrix

Joel E. Cohen.
Proc. Amer. Math. Soc. 81 (1981), 657-658
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MathSciNet review: 601750