Contents of Volume 126, Number 5

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Free products of abelian groups in the unit group of integral group rings

Eric Jespers; Guilherme Leal
Proc. Amer. Math. Soc. 126 (1998), 1257-1265.
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Quasi-flats in semihyperbolic groups

P. Papasoglu
Proc. Amer. Math. Soc. 126 (1998), 1267-1273.
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A Borsuk theorem for antipodal links and a spectral characterization of linklessly embeddable graphs

László Lovász; Alexander Schrijver
Proc. Amer. Math. Soc. 126 (1998), 1275-1285.
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Continuity of K-theory: An example in equal characteristics

Bjørn Ian Dundas
Proc. Amer. Math. Soc. 126 (1998), 1287-1291.
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Subgroup transitivity in abelian groups

Paul Hill; Jane Kirchner West
Proc. Amer. Math. Soc. 126 (1998), 1293-1303.
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The Dedekind-Mertens Lemma and the contents of polynomials

William Heinzer; Craig Huneke
Proc. Amer. Math. Soc. 126 (1998), 1305-1309.
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The Riemann Hypothesis, simple zeros and the asymptotic convergence degree of improper Riemann sums

Jonathan Sondow
Proc. Amer. Math. Soc. 126 (1998), 1311-1314.
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A note on Greenberg's conjecture and the abc conjecture

Humio Ichimura
Proc. Amer. Math. Soc. 126 (1998), 1315-1320.
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When must pure extensions of countable abelian groups necessarily split?

H. Patrick Goeters; Patrick Keef
Proc. Amer. Math. Soc. 126 (1998), 1321-1329.
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Cohomology of certain congruence subgroups of the modular group

Frank Williams; Robert J. Wisner
Proc. Amer. Math. Soc. 126 (1998), 1331-1336.
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The primitive $p$-Frobenius groups

P. Fleischmann; W. Lempken; Pham Huu Tiep
Proc. Amer. Math. Soc. 126 (1998), 1337-1343.
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A relation between Hochschild homology and cohomology for Gorenstein rings

Michel van den Bergh
Proc. Amer. Math. Soc. 126 (1998), 1345-1348.
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On the characterization of certain similarly ordered super-additive functionals

Heinz J. Skala
Proc. Amer. Math. Soc. 126 (1998), 1349-1353.
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The point spectrum of Frobenius-Perron and Koopman operators

J. Ding
Proc. Amer. Math. Soc. 126 (1998), 1355-1361.
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On analytic structure of solutions to higher order abstract Cauchy problems

Yulia Mishura; Yuri Tomilov
Proc. Amer. Math. Soc. 126 (1998), 1363-1370.
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Characterizations of W-type spaces

J. J. Betancor; L. Rodríguez-Mesa
Proc. Amer. Math. Soc. 126 (1998), 1371-1379.
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On the topological boundary of semi-Fredholm operators

Haïkel Skhiri
Proc. Amer. Math. Soc. 126 (1998), 1381-1389.
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On higher order Bourgain algebras of a nest algebra

Timothy G. Feeman
Proc. Amer. Math. Soc. 126 (1998), 1391-1396.
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Ditkin's condition for certain Beurling algebras

Sen-Zhong Huang; Jan van Neerven; Frank Räbiger
Proc. Amer. Math. Soc. 126 (1998), 1397-1407.
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Spectral averaging and the Krein spectral shift

Barry Simon
Proc. Amer. Math. Soc. 126 (1998), 1409-1413.
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On the growth of polynomials

D. Dryanov; Q. I. Rahman
Proc. Amer. Math. Soc. 126 (1998), 1415-1423.
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A counterexample to a question of R. Haydon, E. Odell and H. Rosenthal

G. Androulakis
Proc. Amer. Math. Soc. 126 (1998), 1425-1428.
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An estimate on the distortion of the logarithmic capacity

María J. González
Proc. Amer. Math. Soc. 126 (1998), 1429-1431.
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Periodic groups of operators in Banach spaces

B. Nagy
Proc. Amer. Math. Soc. 126 (1998), 1433-1444.
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On the reducibility of linear differential equations with quasiperiodic coefficients which are degenerate

Xu Junxiang; Zheng Qin
Proc. Amer. Math. Soc. 126 (1998), 1445-1451.
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Hausdorff dimension and doubling measures on metric spaces

Jang-Mei Wu
Proc. Amer. Math. Soc. 126 (1998), 1453-1459.
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*-representations on Banach *-algebras

A. K. Gaur
Proc. Amer. Math. Soc. 126 (1998), 1461-1466.
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The structure of $C^*$-extreme points in spaces of completely positive linear maps on $C^*$-algebras

Douglas R. Farenick; Hongding Zhou
Proc. Amer. Math. Soc. 126 (1998), 1467-1477.
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Chain rules for coderivatives of multivalued mappings in Banach spaces

A. Jourani; L. Thibault
Proc. Amer. Math. Soc. 126 (1998), 1479-1485.
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Twist points of the von Koch snowflake

Fausto Di Biase; Bert Fischer; Rüdiger L. Urbanke
Proc. Amer. Math. Soc. 126 (1998), 1487-1490.
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Global asymptotic behavior of solutions of a semilinear parabolic equation

Qi S. Zhang; Z. Zhao
Proc. Amer. Math. Soc. 126 (1998), 1491-1500.
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A solution to a problem on invertible disjointness preserving operators

Yuri A. Abramovich; Arkady K. Kitover
Proc. Amer. Math. Soc. 126 (1998), 1501-1505.
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The quadratic form in the Lévy-Khinchin formula on semigroups

Dragu Atanasiu
Proc. Amer. Math. Soc. 126 (1998), 1507-1514.
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Some results on the convex hull of finitely many convex sets

Albert Borbély
Proc. Amer. Math. Soc. 126 (1998), 1515-1525.
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Volume of intersections and sections of the unit ball of $\ell^n_p$

Michael Schmuckenschläger
Proc. Amer. Math. Soc. 126 (1998), 1527-1530.
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On uniqueness of Riemann's examples

Yi Fang; Fusheng Wei
Proc. Amer. Math. Soc. 126 (1998), 1531-1539.
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Improving the metric in an open manifold with nonnegative curvature

Luis Guijarro
Proc. Amer. Math. Soc. 126 (1998), 1541-1545.
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On a theorem by do Carmo and Dajczer

Guido Haak
Proc. Amer. Math. Soc. 126 (1998), 1547-1548.
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On some new ideals on the Cantor and Baire spaces

Jacek Cichon; Jan Kraszewski
Proc. Amer. Math. Soc. 126 (1998), 1549-1555.
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Some noninvertible links

Gui-Song Li
Proc. Amer. Math. Soc. 126 (1998), 1557-1563.
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The determination of the pairs of two-bridge knots or links with Gordian distance one

Ichiro Torisu
Proc. Amer. Math. Soc. 126 (1998), 1565-1571.
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A version of Zabrodsky's lemma

Jin-yen Tai
Proc. Amer. Math. Soc. 126 (1998), 1573-1578.
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