Found 91 Documents (Results 1–91)
Best constants in inequalities involving analytic and co-analytic projections and Riesz’s theorem in various function spaces. (English) Zbl 1530.30049
Boundary values in spaces spanned by rational functions and the index of invariant subspaces. (English) Zbl 1527.30022
Reviewer: Stamatis Pouliasis (Thessaloniki)
A note on arclength null quadrature domains. (English) Zbl 1521.30017
Reviewer: Marius Ghergu (Dublin)
Approximation numbers of composition operators on weighted Besov spaces of analytic functions. (English) Zbl 1507.47050
Nevanlinna and Carleson functions of analytic self-maps on multiply-connected domains. (English) Zbl 07745770
On the feasibility of extrapolation of the complex electromagnetic permittivity function using Kramers-Kronig relations. (English) Zbl 1482.30006
MSC:
30B40
20 open questions about deformations of compactifiable manifolds. (English) Zbl 1484.32019
MSC:
32G05
Szegő and Widom theorems for finite codimensional subalgebras of a class of uniform algebras. (English) Zbl 1494.47052
Reviewer: Oleksiy Karlovych (Lisboa)
Some questions on \(L^1\)-approximation in Bergman spaces. (English) Zbl 1485.30017
Reviewer: Raymond Mortini (Metz)
Bundle shifts and Toeplitz operators on \(\mathcal{N}_{\psi}\)-type quotient modules of the tridisc. (English) Zbl 1520.47066
On the Cauchy transform vanishing outside a compact. (English) Zbl 1461.30087
Reviewer: Marius Ghergu (Dublin)
On the Widom factors for \(L_p\) extremal polynomials. (English) Zbl 1452.41003
Reviewer: Klaus Schiefermayr (Wels)
Hereditarily non uniformly perfect sets. (English) Zbl 1436.31009
Reviewer: Marius Ghergu (Dublin)
Reducing subspaces of analytic Toeplitz operators on the Bergman space of the annulus. (English) Zbl 1494.47053
Carleson measures on circular domains and canonical embeddings of Hardy spaces into function lattices. (English) Zbl 1439.46021
Classical properties of composition operators on Hardy-Orlicz spaces on planar domains. (English) Zbl 1508.47052
On the concept of inner function in Hardy and Bergman spaces in multiply connected domains. (English) Zbl 1429.30046
Reviewer: Ali Abkar (Qazvin)
Curvature inequalities and extremal operators. (English) Zbl 1429.30017
Reviewer: Yuri I. Karlovich (Cuernavaca)
The range and valence of a real Smirnov function. (English) Zbl 1432.30040
Reviewer: Joan Fàbrega (Barcelona)
Asymptotics of Chebyshev polynomials. II: DCT subsets of \(\mathbb{R}\). (English) Zbl 1426.41035
Reviewer: Jürgen Müller (Trier)
Curvature inequalities for operators in the Cowen-Douglas class of a planar domain. (English) Zbl 06971418
On the hyperreflexivity of subspaces of Toeplitz operators on regions in the complex plane. (English) Zbl 1332.47062
Preduals of \(H^\infty\) of finitely connected domains. (English) Zbl 1296.46043
Reviewer: Timothy Feeman (Villanova)
Test functions, Schur-Agler classes and transfer-function realizations: the matrix-valued setting. (English) Zbl 1303.47016
Analytic functions in Smirnov classes \(E^p\) with real boundary values. II. (English) Zbl 1275.30029
Reviewer: D. A. Brannan (Milton Keynes)
Szegő’s theorem on Parreau-Widom sets. (English) Zbl 1235.42021
Reviewer: Brett Wick (Atlanta)
Compact operators and Toeplitz algebras on multiply-connected domains. (English) Zbl 1220.47146
Reviewer: Vladimir S. Pilidi (Rostov-na-Donu)
Topological stable rank of \(H^{\infty}(\Omega)\) for circular domains \(\Omega\). (English) Zbl 1274.46106
Abrahamse’s interpolation theorem and Fuchsian groups. (English) Zbl 1221.30083
Reviewer: Alexander Ivanovich Budkin (Barnaul)
Local spectral properties of reflectionless Jacobi, CMV, and Schrödinger operators. (English) Zbl 1165.34051
Reviewer: Petru A. Cojuhari (Kraków)
Invariant subspaces for Banach space operators with an annular spectral set. (English) Zbl 1134.47005
Reviewer: Ömer Gök (Istanbul)
Multiplicative linear functionals and ring homomorphisms of \(H^+_{\varphi}\). (English) Zbl 1161.46014
Real separated algebraic curves, quadrature domains, Ahlfors type functions and operator theory. (English) Zbl 1131.47062
Reviewer: Vladimir V. Peller (East Lansing)
A matricial corona theorem. (English) Zbl 1134.32301
Reviewer: Raymond Mortini (Metz) (MR2213732)
Subnormal and hyponormal generators of \(C^{*}\)-algebras. (English) Zbl 1096.47043
Reviewer: Mihai Putinar (Santa Barbara)
Certain characterizations of Carathéodory domains. (English) Zbl 1103.30022
Reviewer: Raymond Mortini (Metz)
The failure of rational dilation on a triply connected domain. (English) Zbl 1089.47009
Reviewer: Dan E. Popovici (Timişoara)
Boundary correspondence of Nevanlinna counting functions for self-maps of the unit disc. (English) Zbl 1210.30012
Reviewer: Peter Lappan (East Lansing)
On Blaschke products associated with \(n\)-widths. (English) Zbl 1043.30018
Reviewer: Lou Zengjian (Shantou Guangdong)
MSC:
30D50
41A46
Restriction operators, balayage and doubly orthogonal systems of analytic functions. (English) Zbl 1027.30057
Reviewer: T.Nakazi (Sapporo)
Measures induced by analytic functions and a problem of Walter Rudin. (English) Zbl 1012.30022
Reviewer: Leonid Golinskii (Kharkov)
MSC:
30D50
On \(L_{p}\)-generalization of a theorem of Adamyan, Arov, and Kreĭn. (English) Zbl 1017.47024
Reviewer: Mihai Turinici (Iaşi)
MSC:
47B35
30D50
Asymptotics for minimal Blaschke products and best \(L_1\) meromorphic approximants of Markov functions. (English) Zbl 1038.41005
Reviewer: Aldric L. Brown (London)
MSC:
41A20
Exposedness in Hardy spaces of domains of finite connectivity. (English) Zbl 1012.30023
Reviewer: Leonid Golinskii (Kharkov)
Hyperinvariant subspaces of \(C_0\)-operators over a multiply connected region. (English) Zbl 0953.47007
Reviewer: K.Zhu (Albany)
A complex extremal problem of Chebyshev type. (English) Zbl 0923.30002
Reviewer: Gerald Schmieder (Oldenburg)
MSC:
30C10
The asymptotic distribution of zeros of minimal Blaschke products. (English) Zbl 0923.30022
Reviewer: T.Nakazi (Sapporo)
MSC:
30D50
Normal limits in star-invariant subspaces in multiply connected domains. (English) Zbl 0927.30031
Reviewer: Wolfgang Sproessig (Freiberg)
A uniqueness theorem and the Myberg phenomenon. (English) Zbl 0977.30032
Reviewer: H.Köditz (Hannover)
On the angles between subspaces, the Muckenhoupt condition, and projection from one co-invariant subspace onto another in the theory of character-automorphic Hardy spaces on a multiply connected domain. (English. Russian original) Zbl 0945.30028
J. Math. Sci., New York 95, No. 3, 2276-2294 (1999); translation from Zap. Nauchn. Semin. POMI 237, 161-193 (1997).
Reviewer: K.Malyutin (Sumy)
MSC:
30D55
47B38
Optimal information for approximating periodic analytic functions. (English) Zbl 0891.65022
Reviewer: W.Govaerts (Gent)
Resolutions of Hilbert modules. (English) Zbl 0960.46034
Reviewer: H.Mascart (Toulouse)
Widths and optimal sampling in spaces of analytic functions. (English) Zbl 0880.41019
Reviewer: W.W.Breckner (Cluj-Napoca)
Hankel operator and \(H_ \infty\) distance problem over a simply- connected domain. (English) Zbl 0828.93024
Reviewer: Sun Shanli (Changchun)
Two sheeted discs and bounded analytic functions. (English) Zbl 0795.30029
Reviewer: H.Köditz (Hannover)
A characterization of Hardy-Orlicz spaces on planar domains. (English) Zbl 0777.30021
Reviewer: M.Stoll (Columbia)
MSC:
30D55
Bounded analytic functions on two sheeted discs. (English) Zbl 0759.30018
Reviewer: H.Köditz (Hannover)
Pick conditions on a uniform algebra and von Neumann inequalities. (English) Zbl 0762.46053
Reviewer: T.V.Tonev (Missoula)
MSC:
46J10
Pointwise bounded approximation by polynomials. (English) Zbl 0768.30024
Reviewer: K.Menke (Dortmund)
MSC:
30E10
Prescribing curvature on open surfaces. (English) Zbl 0799.53047
Reviewer: M.Craioveanu (Timişoara)
MSC:
53C20
The \(n\)-width of the unit ball of \(H^ p\). (English) Zbl 0746.41026
Reviewer: G.D.Taylor (Fort Collins)
Bounded modules, extremal problems, and a curvature inequality. (English) Zbl 0727.46029
Reviewer: H.Mascart (Toulouse)
MSC:
46H25
Imbedding of power series spaces and spaces of analytic functions. (English) Zbl 0724.46009
Reviewer: F.Haslinger (Wien)
Functions of bounded characteristic in n-connected domains. (English) Zbl 0719.30024
Reviewer: D.Khavinson (Fayetteville)
MSC:
30D55
Hankel operators on planar domains. (English) Zbl 0703.47019
Reviewer: J.Janas
Invariant subspaces of the operator of multiplication by \(z\) in the space \(E^ p\) in a multiply connected domain. (English. Russian original) Zbl 0784.47038
J. Sov. Math. 61, No. 2, 2046-2056 (1992); translation from Zap. Nauchn. Semin. Leningr. Otd. Mat. Inst. Steklova 178, 166-183 (1989).
Factorization of univalent analytic functions on compact Riemann surfaces with boundary. (English. Russian original) Zbl 0784.30037
J. Sov. Math. 63, No. 2, 275-290 (1993); translation from Zap. Nauchn. Semin. Leningr. Otd. Mat. Inst. Steklova 170, 285-313 (1989).
MSC:
30F10
30D50
Envelopes, widths, and Landau problems for analytic functions. (English) Zbl 0671.41016
Reviewer: T.Šalát
MSC:
41A46
F. and M. Riesz theorem, analytic balayage, and problems in rational approximation. (English) Zbl 0666.30025
Reviewer: V.V.Peller
On bounded analytic functions in finitely connected domains. (English) Zbl 0629.32003
Reviewer: B.Aupetit
Restricted left invertible Toeplitz operators on multiply connected domains. (English) Zbl 0622.47024
Reviewer: R.Mortini
Numerical computation of the Ahlfors map of a multiply connected planar domain. (English) Zbl 0598.30010
Reviewer: W.Niethammer
A holomorphic version of Landau’s theorem. (English) Zbl 0568.30029
Reviewer: Richard H. Rochberg (St. Louis)
MSC:
30H10
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