Sommaire du Fascicule no. 4

$(0,3)$ interpolation on the zeros of $\pi_n(x)$

Akhlaghi, M.R. ; Chak, A.M. ; Sharma, A.

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p. 9-22

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On Ikebe's Condition

Amir, Dan

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p. 23-32

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Divided difference operators and classical orthogonal polynomials

Askey, Richard

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p. 33-38

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Asymptotics for orthogonal polynomials with regularly varying recurrence coefficients

Assche, Walter Van ; Geronimo, Jeffrey S.

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p. 39-50

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Continuous approximation methods for the regularization and smoothing of integral transforms

Bennell, R.P. ; Mason, J.C.

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p. 51-66

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An example of a Chebyshev set

Berens, H. ; Schmid, H.J.

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p. 67-72

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Converse results in the theory of equiconvergence of interpolating rational functions

Bokhari, M.A.

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p. 73-82

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T -invariant algebras on Riemann surfaces II

Boivin, Andrè

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p. 83-92

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Approximating $\pi$ with Ramanujan's solvable modular equations

Borwein, J.M. ; Borwein, P.B.

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p. 93-102

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Sudden symmetry in simultaneous approximation

Bruin, M.G. De

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p. 103-112

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Atomic characterizations of modulation spaces through Gabor-type representations

Feichtinger, Hans G.

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p. 113-126

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A problem of Rubel concerning approximation on unbounded sets by entire functions

Gauthier, P.M. ; Hengartner, W. ; Stray, A.

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p. 127-136

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On duality in rational approximation

Gierz, Gerhard ; Shektman, Boris

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p. 137-144

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Bernstein inequalities in $L_p, 0\leq p\leq +\infty$

Golitschek, M.V. ; Lorentz, G.G.

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p. 145-156

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Degree of approximation by lacunary interpolators: $(0,\dots,R-2,R)$ interpolation

Gonska, Heinz H.

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p. 157-172

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Convexity preserving convolution operators

Goodman, T.N.T. ; Lee, S.L.

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p. 173-180

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Approximation of Zolotarev type

Haussman, Werner ; Zeller, Karl

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p. 181-188

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Bivariate cardinal interpolation on the 3-direction mesh: $\ell^p$-data

Höllig, Klaus ; Marsden, Martin ; Riemenschneider, Sherman

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p. 189-198

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A constructive proof of convergence of the even approximants of positive PC-fractions

Jones, William B. ; Thron, W.J.

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p. 199-210

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Contraction of the Schur algorithm for functions bounded in the unit disk

Jones, William B. ; Thron, W.J.

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p. 211-222

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Symmetry techniques for $q$-series: Askey-Wilson polynomials

Kalnins, E.G. ; Miller, Willard

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p. 223-230

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Monotone polynomial approximation in $L^p$

Leviatan, D.

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p. 231-242

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Jackson type theorems in approximation by reciprocals of polynomials

Levin, A.L. ; Saff, E.B.

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p. 243-250

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Proximinality in $L^p(S,Y)$

Light, W.A.

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p. 251-260

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Sufficient conditions for asymptotics associated with weighted extremal problems onR

Lubinsky, D.S. ; Saff, E.B.

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p. 261-270

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On the Riemann convergence of positive linear operators

Mevissen, H. ; Nessel, R.J. ; Wickeren, E. Van

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p. 271-280

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Approximation by Cheney-Sharma-Kantorovic polynomials in the $L^p$-metric

Müller, Manfred M.

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p. 281-292

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Characterization of measures associated with orthogonal polynomials on the unit circle

Nevai, Paul

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p. 293-302

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$n$-convexity and majorization

Peĉarić, J.E. ; Zwick, D.

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p. 303-312

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Rational approximation - analysis of work of Pekarskii

Peetre, Jaak ; Karlsson, Johan

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p. 313-334

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Proximinality of certain subspaces of $C_b(S;E)$

Prolla, Joao B. ; Chiacchio, Ary O.

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p. 335-344

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Extension of a theorem of Laguerre to entire functions of exponential type II

Rahman, Q.I. ; Schmeisser, G.

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p. 345-352

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Sharp lower bounds for a generalized Jensen inequality

Rigler, A.K. ; Trimble, S.Y. ; Varga, Richard S.

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p. 353-374

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Real vs. complex rational Chebyshev approximation on an interval

Ruttan, A. ; Varga, R.S.

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p. 375-382

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Extensions of the Heisenberg group and coaxial coupling of transverse eigenmodes

Schempp, Walter

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p. 383-394

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A note on positive quadrature rules

Schmid, H.J.

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p. 395-404

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On norm and zero asymptotics of orthogonal polynomials for general measures

Wyneken, Matthew F.

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p. 405-414

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On the relative growth of area of subordinate functions

Eenigenburg, P.J.

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p. 415-422

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Ideals differential under high order derivatives

Bommer, R.M.

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p. 423-428

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A remark on regular operators

Mikusinski, Piotr

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p. 429-432

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Linear algebra in the category of $C(X)$- locally convex modules

Kitchen, J.W. ; Robbins, D.A.

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p. 433-480

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On the univariate cardinal interpolation by shifted spines

Sivakumar, N.

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p. 481-490

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A new approach to the study of Harris type Markov operators

Foguel, Shaul R.

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p. 491-512

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Linear spaces of sequences

Brauer, George

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p. 513-530

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Morse theory without critical points

Smith, J. Wolfgang

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p. 531-544

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On weakly analytic subsets of $\ell^\infty$

Bator, Elizabeth ; Huff, Robert E.

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p. 545-548

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Inverse limit means are not preserved under homeomorphisms

Wilder, B.E.

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p. 549-552

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A good inequality for double layer potentials of surfaces that are not Lipschitz

Krikeles, Basil C.

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p. 553-560

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Correction to "Inflow boundary conditions for steady flows of viscoelastic constitutive laws", Volume 18, 445 453

Renardy, Michael

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p. 561-562

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Fundamentals of analysis over surreal number fields

Alling, N.L.

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p. 565-574

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On quadratic forms and Galois cohomology

Arason, J.K. ; Elman, R. ; Jacob, B.

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p. 575-588

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The behavior of the $u$-invariant of a field of characteristic 2 under finite extensions

Aravire, R. ; Baeza, R.

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p. 589-600

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Discrete valued fields with infinite uB$ $-invariant: research announcement

Bayod, J.M. ; Fernandez-Ferreiròs, P. ; Maurica, J. Martinez

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p. 601-604

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Automorphisms and isomorphisms of Henselian fields

Brown, R.

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p. 605-610

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The ultrafilter theorem in real algebraic geometry

Brumfiel, G.W.

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p. 611-628

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Orderings and valuations on $*$-fields

Craven, T.C.

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p. 629-646

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Nach functions and the structure sheaf

Cucker, F.

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p. 647-650

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On the Pierce-Birkhoff conjecture over ordered fields

Delzell, C.N.

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p. 651-668

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Ideal class groups of exponent two and one-class genera of binary quadratic lattices

Earnest, A.G.

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p. 669-674

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On the parity of the class number of the field of $q$-th roots of unity

Estes, D.R.

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p. 675-682

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Ideal class groups of Witt rings

Fitzgerald, R.W.

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p. 683-686

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Combinatorial techniques and abstract Witt rings II

Fitzgerald, R.W. ; Yucas, J.

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p. 687-708

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A decision method for certain algebraic geometry problems

Ko, H.P. ; Chou, S.C.

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p. 709-724

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Even positive definite unimodular quadratic forms over real quadratic fields

Hsia, J.S.

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p. 725-734

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Orthogonal decompositions of indefinite quadratic forms

James, D.G.

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p. 735-740

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On the scharlau transfer

Kahn, B.

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p. 741-748

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On the Clifford-Littlewood-Eckman groups: A new look at periodicity mod 8

Lam, T.Y. ; Smith, T.

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p. 749-786

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Levels of quaternion algebras

Lewis, D.W.

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p. 787-792

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Decomposing Witt rings of characteristic two

Marshall, M.

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p. 793-806

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The representation theorem for spaces of signatures

Marshall, M. ; Mulcahy, C.

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p. 807-810

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Proper embedding into a unit lattice

Mimura, Y.

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p. 811-818

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Classes of quaternion algebras in the brauer group

Mináč, J.

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p. 819-832

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$u = 4$ and quadratic extensions

Mináč, J. ; Spira, M.

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p. 833-846

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On the structure of even unimodular extremal lattices of rank 40

Ozeki, M.

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p. 847-862

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Jacobi theta series

Peters, M.

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p. 863-870

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Between Groups and rings

Pillay, A. ; Scowcroft, P. ; Steinhorn, C.

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p. 871-886

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Theta series of degree 2 of quaternary quadratic forms

Schulze-Pillot, R.

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p. 887-892

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Finite spaces of signatures: research anouncement

Powers, V.

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p. 893-896

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On trace forms of algebraic function fields

Prestel, A.

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p. 897-912

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Open morphisms of real closed spaces

Schwartz, N.

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p. 913-938

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Geometric moduli for klein surfaces

Seppala, M. ; Sorvali, T.

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p. 939-946

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Groups of small order as Galois groups over $Q$

Sonn, J.

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p. 947-956

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Simultaneous similarities of pairs of $2 \times 2$ integral symmetric matrices

Taussky, O.

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p. 957-966

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On the analyticity of the homology

Tognoli, A.

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p. 967-972

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On orderings, valuations and $0$-primes of a commutative ring

Valente, K.G.

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p. 973-984

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Stability in Witt rings and abelian subgroups of pro-2-galois groups

Ware, R.

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p. 985-996

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A localization operator for rational modules

Wang, J. Li-Ming

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p. 999-1002

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On the Möbius function of a finite group

Hawkes, T. ; Isaacs, I.M. ; Özaydin, M.

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p. 1003-1034

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Continued fraction tails and irrationality

Hovstad, R.M.

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p. 1035-1042

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Mixed modules in $L*$

Göbel, R. ; Goldsmith, B.

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p. 1043-1058

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An embedding theorem for mixed normed spaces

Jevtić, M.

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p. 1059-1068

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Residuacity of Primes

Evans, R.

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p. 1069-1082

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A distortion theorem for the class of Möbius transformations of convex mappings

Ali, R.M.

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p. 1083-1094

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Identity-preserving embeddings of countable rings into 2-generator rings

O'meara, K.C. ; Vinsonhaler, C.I. ; Wickless, W.J.

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p. 1095-1106

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Volume Index to Volume 19

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p. 1107-1110

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