Proceedings of the American Mathematical Society

Contents of Volume 20, Number 1
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Approximating semigroups and the consistency of difference schemes

Gilbert Strang

Proc. Amer. Math. Soc. 20 (1969), 1-7

DOI: https://doi.org/10.1090/S0002-9939-1969-0233239-1

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A coefficient inequality for certain classes of analytic functions

F. R. Keogh and E. P. Merkes

Proc. Amer. Math. Soc. 20 (1969), 8-12

DOI: https://doi.org/10.1090/S0002-9939-1969-0232926-9

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A theorem on infinite positive matrices

E. Netanyahu and M. Reichaw

Proc. Amer. Math. Soc. 20 (1969), 13-15

DOI: https://doi.org/10.1090/S0002-9939-1969-0236203-1

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A problem of Wiener and the failure of a principle for Fourier series with positive coefficients

Stephen Wainger

Proc. Amer. Math. Soc. 20 (1969), 16-18

DOI: https://doi.org/10.1090/S0002-9939-1969-0236397-8

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Minimal solutions to a class of parabolic partial differential equations

T. Guinn and E. M. Landesman

Proc. Amer. Math. Soc. 20 (1969), 19-23

DOI: https://doi.org/10.1090/S0002-9939-1969-0235286-2

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Ellipticity and regularity for periodic nonlinear equations

Robert A. Adams

Proc. Amer. Math. Soc. 20 (1969), 24-26

DOI: https://doi.org/10.1090/S0002-9939-1969-0243191-0

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A uniqueness theorem for some nonlinear boundary value problems

A. Kadish

Proc. Amer. Math. Soc. 20 (1969), 27-29

DOI: https://doi.org/10.1090/S0002-9939-1969-0233072-0

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A note on eigenvalues of normal transformations

R. E. L. Turner

Proc. Amer. Math. Soc. 20 (1969), 30-34

DOI: https://doi.org/10.1090/S0002-9939-1969-0240654-9

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Weierstrass points and analytic submanifolds of Teichmueller space

H. M. Farkas

Proc. Amer. Math. Soc. 20 (1969), 35-38

DOI: https://doi.org/10.1090/S0002-9939-1969-0232928-2

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A note on the Littlewood-Tauber theorem

M. L. Glasser

Proc. Amer. Math. Soc. 20 (1969), 39-40

DOI: https://doi.org/10.1090/S0002-9939-1969-0233111-7

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Normal operators

Myron Goldstein

Proc. Amer. Math. Soc. 20 (1969), 41-44

DOI: https://doi.org/10.1090/S0002-9939-1969-0251214-8

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On a theorem of Fejér and Riesz

F. R. Keogh

Proc. Amer. Math. Soc. 20 (1969), 45-50

DOI: https://doi.org/10.1090/S0002-9939-1969-0247013-3

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Almost convergent and almost summable sequences

Paul Schaefer

Proc. Amer. Math. Soc. 20 (1969), 51-54

DOI: https://doi.org/10.1090/S0002-9939-1969-0235340-5

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The approximate divergence operator

Victor L. Shapiro

Proc. Amer. Math. Soc. 20 (1969), 55-60

DOI: https://doi.org/10.1090/S0002-9939-1969-0236623-5

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Comparison theorems and integral inequalities for Volterra integral equations

Paul R. Beesack

Proc. Amer. Math. Soc. 20 (1969), 61-66

DOI: https://doi.org/10.1090/S0002-9939-1969-0234228-3

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Oscillation theorems for linear second order ordinary differential equations

J. W. Macki and J. S. W. Wong

Proc. Amer. Math. Soc. 20 (1969), 67-72

DOI: https://doi.org/10.1090/S0002-9939-1969-0235202-3

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Eigenvalue of the square of a function

A. M. Fink

Proc. Amer. Math. Soc. 20 (1969), 73-74

DOI: https://doi.org/10.1090/S0002-9939-1969-0234046-6

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Extending real maps defined on a subset of a disk

B. J. Ball, Jo Ford and E. S. Thomas

Proc. Amer. Math. Soc. 20 (1969), 75-80

DOI: https://doi.org/10.1090/S0002-9939-1969-0235538-6

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The area and variation of linearly continuous functions

William P. Ziemer

Proc. Amer. Math. Soc. 20 (1969), 81-87

DOI: https://doi.org/10.1090/S0002-9939-1969-0233959-9

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Some properties of a generalized Hausdorff mean

C. W. Leininger

Proc. Amer. Math. Soc. 20 (1969), 88-96

DOI: https://doi.org/10.1090/S0002-9939-1969-0234163-0

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Convergence-preservation criteria for a generalized Hausdorff mean.

C. W. Leininger

Proc. Amer. Math. Soc. 20 (1969), 97-100

DOI: https://doi.org/10.1090/S0002-9939-1969-0234164-2

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Totally bounded sets of precompact linear operators

Theodore W. Palmer

Proc. Amer. Math. Soc. 20 (1969), 101-106

DOI: https://doi.org/10.1090/S0002-9939-1969-0235425-3

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Product solutions for simple games. II

T. Parthasarathy

Proc. Amer. Math. Soc. 20 (1969), 107-114

DOI: https://doi.org/10.1090/S0002-9939-1969-0378867-8

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The operator equation $BX-XA=Q$ with self-adjoint $A$ and $B$

Marvin Rosenblum

Proc. Amer. Math. Soc. 20 (1969), 115-120

DOI: https://doi.org/10.1090/S0002-9939-1969-0233214-7

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Operators similar to their adjoints

James P. Williams

Proc. Amer. Math. Soc. 20 (1969), 121-123

DOI: https://doi.org/10.1090/S0002-9939-1969-0233230-5

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Weak compactness of measures

Benjamin B. Wells

Proc. Amer. Math. Soc. 20 (1969), 124-130

DOI: https://doi.org/10.1090/S0002-9939-1969-0238067-9

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Sums of irreducible operators

Peter A. Fillmore and David M. Topping

Proc. Amer. Math. Soc. 20 (1969), 131-133

DOI: https://doi.org/10.1090/S0002-9939-1969-0233226-3

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Charlier spaces of entire functions

Louis de Branges and David Trutt

Proc. Amer. Math. Soc. 20 (1969), 134-140

DOI: https://doi.org/10.1090/S0002-9939-1969-0626531-X

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Fixed-point theorems for certain classes of nonexpansive mappings

L. P. Belluce and W. A. Kirk

Proc. Amer. Math. Soc. 20 (1969), 141-146

DOI: https://doi.org/10.1090/S0002-9939-1969-0233341-4

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Density of one graph along another

Jack B. Brown

Proc. Amer. Math. Soc. 20 (1969), 147-149

DOI: https://doi.org/10.1090/S0002-9939-1969-0232897-5

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Pointed minimal sets and $S$-regularity

Brindell Horelick

Proc. Amer. Math. Soc. 20 (1969), 150-156

DOI: https://doi.org/10.1090/S0002-9939-1969-0235546-5

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On an arcwise connected subgroup of a Lie group

Morikuni Goto

Proc. Amer. Math. Soc. 20 (1969), 157-162

DOI: https://doi.org/10.1090/S0002-9939-1969-0233923-X

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A remark on a theorem of A. Weil

Morikuni Goto

Proc. Amer. Math. Soc. 20 (1969), 163-165

DOI: https://doi.org/10.1090/S0002-9939-1969-0232888-4

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Continuous derivations on Banach algebras

A. M. Sinclair

Proc. Amer. Math. Soc. 20 (1969), 166-170

DOI: https://doi.org/10.1090/S0002-9939-1969-0233207-X

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A theorem on the Hurewicz fiberings

Soon-kyu Kim

Proc. Amer. Math. Soc. 20 (1969), 171-174

DOI: https://doi.org/10.1090/S0002-9939-1969-0233356-6

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A lower bound for the dimension of certain $G_{\delta }$ sets in completely normal spaces

James B. Wilkinson

Proc. Amer. Math. Soc. 20 (1969), 175-178

DOI: https://doi.org/10.1090/S0002-9939-1969-0238283-6

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Structure of hereditarily infinite dimensional spaces

J. M. Yohe

Proc. Amer. Math. Soc. 20 (1969), 179-184

DOI: https://doi.org/10.1090/S0002-9939-1969-0236896-9

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On reconstructing a graph

Robert L. Hemminger

Proc. Amer. Math. Soc. 20 (1969), 185-187

DOI: https://doi.org/10.1090/S0002-9939-1969-0232696-4

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A differential in the Adams spectral sequence

Daniel S. Kahn

Proc. Amer. Math. Soc. 20 (1969), 188-190

DOI: https://doi.org/10.1090/S0002-9939-1969-0235562-3

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On topological transformation groups

Lloyd Lininger

Proc. Amer. Math. Soc. 20 (1969), 191-192

DOI: https://doi.org/10.1090/S0002-9939-1969-0235544-1

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Valuations on a commutative ring

Merle E. Manis

Proc. Amer. Math. Soc. 20 (1969), 193-198

DOI: https://doi.org/10.1090/S0002-9939-1969-0233813-2

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Rigidity of generalized uniserial and Frobenius algebras

S. S. Page

Proc. Amer. Math. Soc. 20 (1969), 199-202

DOI: https://doi.org/10.1090/S0002-9939-1969-0236246-8

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Formations of group and $\pi$-decomposability

H. Lausch

Proc. Amer. Math. Soc. 20 (1969), 203-206

DOI: https://doi.org/10.1090/S0002-9939-1969-0233891-0

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Determinants on semilattices

Bernt Lindström

Proc. Amer. Math. Soc. 20 (1969), 207-208

DOI: https://doi.org/10.1090/S0002-9939-1969-0238738-4

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Tensor products of simple pure inseparable field extensions

J. N. Mordeson and B. Vinograde

Proc. Amer. Math. Soc. 20 (1969), 209-212

DOI: https://doi.org/10.1090/S0002-9939-1969-0232758-1

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Self-injective semigroup rings for finite inverse semigroups

R. Wenger

Proc. Amer. Math. Soc. 20 (1969), 213-216

DOI: https://doi.org/10.1090/S0002-9939-1969-0232869-0

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Critical groups and the lattice of varieties

John Cossey

Proc. Amer. Math. Soc. 20 (1969), 217-221

DOI: https://doi.org/10.1090/S0002-9939-1969-0232824-0

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On quasi-local noetherian rings

Gerhard Michler

Proc. Amer. Math. Soc. 20 (1969), 222-224

DOI: https://doi.org/10.1090/S0002-9939-1969-0232796-9

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Note on $\textrm {QF}$-$1$ algebras

J. P. Jans

Proc. Amer. Math. Soc. 20 (1969), 225-228

DOI: https://doi.org/10.1090/S0002-9939-1969-0233848-X

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Galois endomorphisms of the torsion subgroup of certain formal groups

Jonathan Lubin

Proc. Amer. Math. Soc. 20 (1969), 229-231

DOI: https://doi.org/10.1090/S0002-9939-1969-0232769-6

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Finite groups with pro-normal subgroups

T. A. Peng

Proc. Amer. Math. Soc. 20 (1969), 232-234

DOI: https://doi.org/10.1090/S0002-9939-1969-0232850-1

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A remark on Prüfer rings

Edward D. Davis

Proc. Amer. Math. Soc. 20 (1969), 235-237

DOI: https://doi.org/10.1090/S0002-9939-1969-0232763-5

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Open mappings and closed subsets of the domain in general metric spaces

James Edgar Keesling

Proc. Amer. Math. Soc. 20 (1969), 238-245

DOI: https://doi.org/10.1090/S0002-9939-1969-0261568-4

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Relative interiors of convex hulls

William E. Bonnice and John R. Reay

Proc. Amer. Math. Soc. 20 (1969), 246-250

DOI: https://doi.org/10.1090/S0002-9939-1969-0234352-5

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A note on maximal locally compact semigroups

James W. Stepp

Proc. Amer. Math. Soc. 20 (1969), 251-253

DOI: https://doi.org/10.1090/S0002-9939-1969-0232883-5

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A set whose square can map onto a perfect set

John R. Isbell

Proc. Amer. Math. Soc. 20 (1969), 254-255

DOI: https://doi.org/10.1090/S0002-9939-1969-0232359-5

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An equivalence theorem for embeddings of compact absolute neighborhood retracts

J. L. Bryant and C. L. Seebeck

Proc. Amer. Math. Soc. 20 (1969), 256-258

DOI: https://doi.org/10.1090/S0002-9939-1969-0244972-X

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On stochastic differentials in Hilbert spaces

E. M. Cabaña

Proc. Amer. Math. Soc. 20 (1969), 259-265

DOI: https://doi.org/10.1090/S0002-9939-1969-0233436-5

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Dominated estimates of positive contractions

R. V. Chacon and J. Olsen

Proc. Amer. Math. Soc. 20 (1969), 266-271

DOI: https://doi.org/10.1090/S0002-9939-1969-0248327-3

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An operator ergodic theorem for sequences of functions

E. M. Klimko and Louis Sucheston

Proc. Amer. Math. Soc. 20 (1969), 272-276

DOI: https://doi.org/10.1090/S0002-9939-1969-0233956-3

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Almost complex submanifolds of the six sphere

Alfred Gray

Proc. Amer. Math. Soc. 20 (1969), 277-279

DOI: https://doi.org/10.1090/S0002-9939-1969-0246332-4

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A canonical linear order for the maximal chains of a tree

James C. Owings

Proc. Amer. Math. Soc. 20 (1969), 280-283

DOI: https://doi.org/10.1090/S0002-9939-1969-0240009-7

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Toeplitz-Hausdorff theorem on numerical ranges

R. Raghavendran

Proc. Amer. Math. Soc. 20 (1969), 284-285

DOI: https://doi.org/10.1090/S0002-9939-1969-0233186-5

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A note on absolute summability

J. A. Fridy

Proc. Amer. Math. Soc. 20 (1969), 285-286

DOI: https://doi.org/10.1090/S0002-9939-1969-0233105-1

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