## Found 3,860 Documents (Results 1–100)

100
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### Hedgehogs in Lehmer’s problem. (English)Zbl 07505696

MSC:  11R06 30E10 33C45
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### Mean approximation in Bergman spaces of polyanalytic functions. (English)Zbl 07500032

MSC:  30G20 30E10
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### Norm estimates for Chebyshev polynomials. II. (English)Zbl 07496963

MSC:  30C10 30E10 26C05
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### Approximating the Gaussian as a sum of exponentials and its applications to the fast Gauss transform. (English)Zbl 07493155

MSC:  30E10 41A20 65F30 65E05 65Y20
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### Approximation by simple partial fractions: universal sets of poles. (English. Russian original)Zbl 07488473

Math. Notes 111, No. 1, 3-6 (2022); translation from Mat. Zametki 111, No. 1, 3-7 (2022).
MSC:  30E10
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### Approximation of functions and all derivatives on compact sets. (English)Zbl 1483.30068

MSC:  30E10 30H50
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### Approximation in weighted analytic Besov spaces and in generalized Fock spaces. (English)Zbl 07451889

MSC:  30H25 30H20 30E10
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### Mixing operators with prescribed unimodular eigenvalues. (English)Zbl 07445057

MSC:  47A16 30E10 37A25
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### A note on Hermite-Fejér interpolation on the non-uniform nodes of the unit circle. (English)Zbl 07527875

MSC:  41A10 41A05 30E10
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### Bernstein-Walsh type inequalities for derivatives of algebraic polynomials in quasidisks. (English)Zbl 07517533

MSC:  30C10 30E10 30C70
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### Point-wise estimates for the derivative of algebraic polynomials. (English)Zbl 07509986

MSC:  30E10 41A20
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### Uniform approximation of functions by solutions of strongly elliptic equations of second order on compact subsets of $$\mathbb{R}^2$$. (English. Russian original)Zbl 07498883

Sb. Math. 212, No. 12, 1730-1745 (2021); translation from Mat. Sb. 212, No. 12, 1730-1745 (2021).
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### The polynomial Hermite-Padé $$m$$-system for meromorphic functions on a compact Riemann surface. (English. Russian original)Zbl 07498882

Sb. Math. 212, No. 12, 1694-1729 (2021); translation from Mat. Sb. 212, No. 12, 1694-1729 (2021).
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### Multidimensional Padé approximation of binomial functions: equalities. (English)Zbl 07497801

MSC:  41A21 11J72 30E10
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### On the representation and the uniform polynomial approximation of polyanalytic functions of Gevrey type on the unit disk. (English)Zbl 07489032

MSC:  30E10 30D60 41A10
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### Approximation by entire functions on a countable set of continua. The inverse theorem. (English. Russian original)Zbl 07485533

Vestn. St. Petersbg. Univ., Math. 54, No. 4, 366-371 (2021); translation from Vestn. St-Peterbg. Univ., Ser. I, Mat. Mekh. Astron. 8(66), No. 4, 600-607 (2021).
MSC:  30E10 30D15
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### On Runge pairs and topology of axially symmetric domains. (English)Zbl 07471024

MSC:  30G35 30E10 32E30
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### Approximate properties of the $$p$$-Bieberbach polynomials in regions with simultaneously exterior and interior zero angles. (English)Zbl 1483.30031

MSC:  30C30 30E10 30C70
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### Weighted Chebyshev polynomials on compact subsets of the complex plane. (English)Zbl 1483.30023

Gesztesy, Fritz (ed.) et al., From operator theory to orthogonal polynomials, combinatorics, and number theory. A volume in honor of Lance Littlejohn’s 70th birthday. Cham: Birkhäuser. Oper. Theory: Adv. Appl. 285, 357-370 (2021).
MSC:  30C10 30E10 41A50
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### The lower estimate of deviations of Fejer sums on classes of Poisson integrals. (English)Zbl 1482.30099

MSC:  30E10 30B40
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### The convex invertible cone structure of positive real odd rational matrix functions. (English)Zbl 07446835

MSC:  30E10 30J15 47A56
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MSC:  30E10
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### “Near-best” polynomial approximation of harmonic functions on compact sets in $$\mathbb{C}$$. (English)Zbl 07436513

MSC:  41A10 30E10
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MSC:  30E10
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### Direct and inverse theorems in variable exponent Smirnov classes. (English)Zbl 1481.30022

MSC:  30E10 30H15 41A10
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### A sampling theorem by perturbing the zeros of a sine-type function. (English)Zbl 1476.30134

MSC:  30E05 30E10
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### Discrete Riemann-Hilbert problem and interpolation of entire functions. (Russian. English translation)Zbl 07407669

Ufim. Mat. Zh. 13, No. 2, 74-85 (2021); translation in Ufa Math. J. 13, No. 2, 70-80 (2021).
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### Jackson-Stechkin type inequalities and widths of classes of functions in the weighted Bergman space. (Russian. English summary)Zbl 1476.30021

MSC:  30C10 30E10
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### On the convergence of the order-preserving weak greedy algorithm for subspaces generated by the Szegö kernel in the Hardy space. (English)Zbl 07406771

MSC:  46E20 30E10
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### On matrix Cauchy biorthogonal polynomials. (English)Zbl 1476.30139

MSC:  30E10 42C05 41A21
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### Logarithmic asymptotic of multi-level Hermite-Padé polynomials. (English)Zbl 1476.30138

MSC:  30E10 41A21 42C05
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### A general lower bound for the asymptotic convergence factor. (English)Zbl 1481.30023

Rassias, Themistocles M. (ed.), Approximation theory and analytic inequalities. Cham: Springer. 487-507 (2021).
MSC:  30E10
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### Convergence of Bieberbach polynomials: Keldysh’s theorems and Mergelyan’s conjecture. (English. Russian original)Zbl 1476.30137

Russ. Math. Surv. 76, No. 3, 379-387 (2021); translation from Usp. Mat. Nauk 76, No. 3, 3-12 (2021).
MSC:  30E10 30C10
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### An extremal problem for the invariant differential operators on a class of Cauchy-type integrals. (Ukrainian. English summary)Zbl 07402563

MSC:  30E10 41A25
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### On the paths of steepest descent for the norm of a one variable complex polynomial. (English)Zbl 1479.30005

MSC:  30C15 30E10
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### A note on simultaneous approximation on Vitushkin sets. (English)Zbl 07390732

MSC:  30E10 26B20
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### Boundary behavior of optimal polynomial approximants. (English)Zbl 1475.30011

MSC:  30B30 30E10 30H10
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### Sharp inequalities between the best root-mean-square approximations of analytic functions in the disk and some smoothness characteristics in the Bergman space. (English. Russian original)Zbl 1477.41006

Math. Notes 110, No. 2, 248-260 (2021); translation from Mat. Zametki 110, No. 2, 266-281 (2021).
MSC:  41A17 30E10 41A25
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### On joint universality of the Riemann zeta-function. (English. Russian original)Zbl 1468.11174

Math. Notes 110, No. 2, 210-220 (2021); translation from Mat. Zametki 110, No. 2, 221-233 (2021).
MSC:  11M06 30E10
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### Approximation by matrix transforms in Morrey spaces. (English)Zbl 1475.30118

MSC:  30H15 30E10 41A25
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### Grüss and Grüss-Voronovskaya-type estimates for complex convolution polynomial operators. (English)Zbl 07381514

MSC:  41A35 30E10
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### Approximation of certain non-vanishing analytic functions in a parabolic region. (English)Zbl 1475.30031

MSC:  30C45 30E10
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### Approximation by $$p(\cdot)$$-Faber polynomials in the variable Smirnov classes. (English)Zbl 1469.30082

MSC:  30E10 41A10 30C10
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### Approximation by simple partial fractions in unbounded domains. (English. Russian original)Zbl 1475.30087

Sb. Math. 212, No. 4, 449-474 (2021); translation from Mat. Sb. 212, No. 4, 3-28 (2021).
MSC:  30E10 41A20
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### A complex homographic best approximation problem. Application to optimized Robin-Schwarz algorithms, and optimal control problems. (English)Zbl 1469.30080

MSC:  30E10 41A10
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### A survey of optimal polynomial approximants, applications to digital filter design, and related open problems. (English)Zbl 1469.30078

MSC:  30E10 30C10 30H99
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### Polynomial approximation in weighted Dirichlet spaces. (English)Zbl 1469.30083

MSC:  30E10 41A10 30H99
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### On the approximation of analytic functions by shifts of an absolutely convergent Dirichlet series. (English. Russian original)Zbl 1475.30089

Math. Notes 109, No. 6, 876-883 (2021); translation from Mat. Zametki 109, No. 6, 832-841 (2021).
MSC:  30E10 30B50 11M06
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### Density of derivatives of simple partial fractions in Hardy spaces in the half-plane. (English. Russian original)Zbl 1469.30081

Math. Notes 109, No. 1, 46-53 (2021); translation from Mat. Zametki 109, No. 1, 57-66 (2021).
MSC:  30E10 30H10
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### TT ranks of approximate tensorizations of some smooth functions. (English. Russian original)Zbl 1469.30084

Comput. Math. Math. Phys. 61, No. 5, 750-760 (2021); translation from Zh. Vychisl. Mat. Mat. Fiz. 61, No. 5, 776-786 (2021).
MSC:  30E10 41A99
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### Approximation in measure: the Dirichlet problem, universality and the Riemann hypothesis. (English. Russian original)Zbl 07368872

Izv. Math. 85, No. 3, 547-561 (2021); translation from Izv. Ross. Akad. Nauk, Ser. Mat. 85, No. 3, 222-238 (2021).
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### Uniform approximation of functions by solutions of second order homogeneous strongly elliptic equations on compact sets in $$\mathbb{R}^2$$. (English. Russian original)Zbl 1468.35046

Izv. Math. 85, No. 3, 421-456 (2021); translation from Izv. Ross. Akad. Nauk, Ser. Mat. 85, No. 3, 89-126 (2021).
MSC:  35J15 30E10
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### On a lower bound for the rate of convergence of multipoint Padé approximants of piecewise analytic functions. (English. Russian original)Zbl 1469.30079

Izv. Math. 85, No. 3, 351-366 (2021); translation from Izv. Ross. Akad. Nauk, Ser. Mat. 85, No. 3, 13-29 (2021).
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### On Baker’s patchwork conjecture for diagonal Padé approximants. (English)Zbl 1467.41007

MSC:  41A21 30E10 41A20
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### The universality of some compositions on short intervals. (English. Russian original)Zbl 1468.30059

Sib. Math. J. 62, No. 3, 449-454 (2021); translation from Sib. Mat. Zh. 62, No. 3, 559-566 (2021).
MSC:  30E10
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### The asymptotic distance between an ultraflat unimodular polynomial and its conjugate reciprocal. (English)Zbl 1476.30030

MSC:  30C15 30E10
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### An introduction to multiple orthogonal polynomials and Hermite-Padé approximation. (English)Zbl 1460.42041

Marcellán, Francisco (ed.) et al., Orthogonal polynomials: current trends and applications. Proceedings of the 7th EIBPOA conference, Universidad Carlos III de Madrid, Leganés, Spain, July 3–6, 2018. Cham: Springer. SEMA SIMAI Springer Ser. 22, 237-271 (2021).
MSC:  42C05 30E10 41A21
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### Norm estimates for Chebyshev polynomials, I. (English)Zbl 1462.41012

MSC:  41A50 30C10 30E10
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### Cesàro summability of Taylor series in weighted Dirichlet spaces. (English)Zbl 1461.30088

MSC:  30E10 30H99
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### Polynomial approach to cyclicity for weighted $$\ell^p_A$$. (English)Zbl 07296620

MSC:  47A16 30E10 30H99
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### Induced fields in isolated elliptical inhomogeneities due to imposed polynomial fields at infinity. (English)Zbl 1483.30069

MSC:  30E10 42A10 35Q74
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### Approximation by complex Chlodowsky-Szasz-Durrmeyer operators in compact disks. (English)Zbl 07473700

MSC:  30E10 41A25
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### Discrete universality of the Riemann zeta-function in short intervals. (English)Zbl 07472187

MSC:  11M06 30E10
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### On approximation of classes of analytic periodic functions by Fejer means. (Russian. English summary)Zbl 1475.42003

MSC:  42A10 30E10
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### Integrability-preserving regularizations of Laplacian growth. (English)Zbl 1469.30056

MSC:  30D05 30E10 30E25
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### Inequalities for algebraic polynomials on an ellipse. (English)Zbl 1462.30012

MSC:  30C10 30E10
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### A large family of linear positive operators. (English)Zbl 1461.30086

MSC:  30E10 41A25 41A35
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### Approximation by entire functions on a countable set of continua. (English. Russian original)Zbl 1461.30071

Vestn. St. Petersbg. Univ., Math. 53, No. 3, 329-335 (2020); translation from Vestn. St-Peterbg. Univ., Ser. I, Mat. Mekh. Astron. 7(65), No. 3, 481-489 (2020).
MSC:  30D15 30E10
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### Approximation of functions of a complex variable by Fourier sums in orthogonal systems in $$L_2$$. (English. Russian original)Zbl 1462.41004

Russ. Math. 64, No. 6, 56-62 (2020); translation from Izv. Vyssh. Uchebn. Zaved., Mat. 2020, No. 6, 65-72 (2020).
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### A criterion for uniform approximability of individual functions by solutions of second-order homogeneous elliptic equations with constant complex coefficients. (English. Russian original)Zbl 1458.35017

Sb. Math. 211, No. 9, 1267-1309 (2020); translation from Mat. Sb. 211, No. 9, 60-104 (2020).
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### On the Cauchy transform vanishing outside a compact. (English)Zbl 1461.30087

MSC:  30E10 37F50
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### Notes on the Szegő minimum problem. II: Singular measures. (English)Zbl 1456.30062

MSC:  30E10 42C05
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### Notes on the Szegő minimum problem. I: Measures with deep zeroes. (English)Zbl 1461.30085

MSC:  30E10 42C05
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### The approximation and growth of entire function represented by Laplace-Stieltjes transform with infinite order. (Chinese. English summary)Zbl 1463.30131

MSC:  30D15 30E10 44A10

### On approximation by Bernstein-Durrmeyer-type operators in movable compact disks. (Chinese. English summary)Zbl 1463.30180

MSC:  30E10 41A25

MSC:  30E10
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### Estimates of the approximations by Zygmund sums in Morrey-Smirnov classes of analytic functions. (English)Zbl 1456.30064

MSC:  30E10 41A10 42A10
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### Asymptotics for Hermite-Padé approximants associated with the Mittag-Leffler functions. (English)Zbl 1456.30066

MSC:  30E10 41A21
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