## Found 9,488 Documents (Results 1–100)

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### Best proximity of proximal $$\mathcal{F}^\ast$$-weak contraction. (English)Zbl 07527641

MSC:  47H10 54H25 05C20
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### Minimax estimation of norms of a probability density. I: Lower bounds. (English)Zbl 07526578

MSC:  62Gxx 62Mxx 94Axx
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### The Chebyshev set problem in Riesz space. (English)Zbl 07525264

MSC:  41-XX 41A50 46A40
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MSC:  65-XX
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### Optimality of constants in power-weighted Birman-Hardy-Rellich-type inequalities with logarithmic refinements. (English. French summary)Zbl 07523616

MSC:  26D10 35A23 41A44
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### Best approximations in a class of Lorentz ideals. (English)Zbl 07511281

MSC:  41A50 47B10 47B35
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### eGHWT: the extended generalized Haar-Walsh transform. (English)Zbl 07510343

MSC:  68-XX 94-XX
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### Extremal interpolation with the least value of the norm of the second derivative in $$L_p(\mathbb{R})$$. (English. Russian original)Zbl 07503384

Izv. Math. 86, No. 1, 203-219 (2022); translation from Izv. Ross. Akad. Nauk, Ser. Mat. 86, No. 1, 219-236 (2022).
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### Approximate calculation of the Chebyshev center for a convex compact set in $$\mathbb{R}^n$$. (English)Zbl 07499213

MSC:  52A20 90C05 41A50
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### Best $$k$$-layer neural network approximations. (English)Zbl 07493726

MSC:  68-XX 41A50 41A30
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### Estimates of approximating characteristics and the properties of the operators of best approximation for the classes of periodic functions in the space $$B_{1,1}$$. (English. Ukrainian original)Zbl 07491010

Ukr. Math. J. 73, No. 8, 1278-1298 (2022); translation from Ukr. Mat. Zh. 73, No. 8, 1102-1119 (2021).
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### Best proximity points in noncommutative Banach spaces. (English)Zbl 07490209

MSC:  47H10 41A65 46L52
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### Inverse theorems on the approximation of periodic functions with high generalized smoothness. (English. Russian original)Zbl 07488510

Math. Notes 111, No. 2, 320-323 (2022); translation from Mat. Zametki 111, No. 2, 312-315 (2022).
MSC:  42A10 41A50 46E35
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### Gibbs phenomena for $$L^q$$-best approximation in finite element spaces. (English)Zbl 1483.65188

MSC:  65N30 41A10 65N50
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### Exact solutions to a nonlinear partial differential equation: the Product-of-Curvatures Poisson $$(u_{x x} u_{y y} = 1)$$. (English)Zbl 07472414

MSC:  33F05 42A10 41A50
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### Finding best approximation pairs for two intersections of closed convex sets. (English)Zbl 07462060

MSC:  90C25 65K05 47H09
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### The order of $$L^1$$-approximation by elements of the disc algebra. (English)Zbl 07438131

MSC:  46E15 30H10 41A65
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### Compressibility analysis of asymptotically mean stationary processes. (English)Zbl 1475.60068

MSC:  60G10 94A12
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### The convexity of Chebyshev sets in normed spaces. (English)Zbl 07527974

MSC:  41A65 41A52 46N10
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### String-averaging methods for best approximation to common fixed point sets of operators: the finite and infinite cases. (English)Zbl 07525613

MSC:  47-XX 54-XX
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### Sharp refined quadratic estimations of Shafer’s inequalities. (English)Zbl 07516013

MSC:  26D05 26D15 42A10
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### On a class of inverse palindromic eigenvalue problem. (English)Zbl 07513674

MSC:  15A29 15A09 15A18
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### On asymptotically optimal cubatures for multidimensional Sobolev spaces. (English)Zbl 07512240

MSC:  41A55 41A44 26D10
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### Strong and pure fixed point properties of mappings on normed spaces. (English)Zbl 07500426

MSC:  46A32 46M05 41A17
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### Ridge functions and applications in neural networks. (English)Zbl 07498870

Mathematical Surveys and Monographs 263. Providence, RI: American Mathematical Society (AMS) (ISBN 978-1-4704-6765-4/pbk; 978-1-4704-6800-2/ebook). ix, 186 p. (2021).
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### Approximation by trigonometric polynomials in the variable exponent weighted Morrey spaces. (English)Zbl 07482110

MSC:  41A10 41A25 42A10
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### Some inequalities for best trigonometric approximation and Fourier coefficients in weighted Orlicz spaces. (English)Zbl 07481086

MSC:  42A10 41A25 46E30

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### On the norms of Boman-Shapiro difference operators. (English. Russian original)Zbl 1482.41004

Proc. Steklov Inst. Math. 315, Suppl. 1, S55-S66 (2021); translation from Tr. Inst. Mat. Mekh. (Ekaterinburg) 26, No. 4, 64-75 (2020).
MSC:  41A17 41A44 47B39
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### Some Padé approximations and inequalities for the complete elliptic integrals of the first kind. (English)Zbl 07465016

MSC:  33E05 26D15 41A21
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### The use of intensity-dependent weight functions to “Weberize” $$L^2$$-based methods of signal and image approximation. (English)Zbl 1482.91172

MSC:  91E30 46N60
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### mean-square approximation by “angle” in the space $$L_{2,\mu}(\mathbb{R}^2)$$ with the Chebyshev-Hermite weight. (English. Russian original)Zbl 07457395

Russ. Math. 65, No. 9, 1-9 (2021); translation from Izv. Vyssh. Uchebn. Zaved., Mat. 2021, No. 9, 3-12 (2021).
MSC:  41Axx 42Axx 33-XX
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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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### Expansion theory for the two-sided best simultaneous approximations. (English)Zbl 07452333

MSC:  41A28 41A65 54C60
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### On min-max affine approximants of convex or concave real-valued functions from $$\mathbb{R}^k$$, Chebyshev equioscillation and graphics. (English)Zbl 07451979

Hirn, Matthew (ed.) et al., Excursions in harmonic analysis, Volume 6. In honor of John Benedetto’s 80th birthday. Cham: Birkhäuser. Appl. Numer. Harmon. Anal., 373-383 (2021).
MSC:  41A50 90C90
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### Upper and lower bounds for the $$Z$$-spectral radius of fourth-order weakly symmetric nonnegative tensors and their applications. (Chinese. English summary)Zbl 07448478

MSC:  15A18 15A72 15A69

### Convergence estimates of finite elements for a class of quasilinear elliptic problems. (English)Zbl 07447589

MSC:  65-XX 35-XX
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### Tree-based tensor formats. (English)Zbl 1479.15026

MSC:  15A69 46B28 46A32
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### Algorithms for common best proximity points of the global minimization problem in Hilbert spaces. (English)Zbl 07439480

MSC:  41A29 47H09
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MSC:  41Axx
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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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### Inequalities between best polynomial approximants and smoothness characteristics of functions in $$L_2$$. (English. Russian original)Zbl 1482.41007

Math. Notes 110, No. 3, 432-439 (2021); translation from Mat. Zametki 110, No. 3, 450-458 (2021).
MSC:  41A17 42A05
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### Weighted variable exponent grand Lebesgue spaces and inequalities of approximation. (English)Zbl 07424380

MSC:  46E30 42A10
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### The best proximity pair focusing on monotonicity and $$T$$-absolutely direct sets. (English)Zbl 1481.41018

MSC:  41A65 41A52
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### Asymptotic properties of trigonometric Padé approximations. (Russian. English summary)Zbl 1480.41004

MSC:  41A21 41A25

### The optimal approximation of qubit states with limited quantum states. (English)Zbl 07409599

MSC:  81-XX 82-XX
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### Error constants for the semi-discrete Galerkin approximation of the linear heat equation. (English)Zbl 07408889

MSC:  65N15 65N30 35K05
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### Estimates of functions with transformed double Fourier series. (English)Zbl 07399087

MSC:  46E30 42B05
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### Optimal general Hermite-Hadamard-type inequalities in a ball and their applications in multidimensional numerical integration. (English)Zbl 07398295

MSC:  65Nxx 35Jxx 65Dxx
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### Jackson-type inequalities and widths of functional classes in the Musielak-Orlicz type spaces. (English)Zbl 1477.41004

MSC:  41A17 42A32
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### Extension of the best polynomial approximation operator in Musielak-Orlicz spaces. (English)Zbl 07393055

MSC:  41A10 41A50 41A52
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### Birkhoff-James orthogonality and applications: a survey. (English)Zbl 1482.46017

Bastos, M. Amélia (ed.) et al., Operator theory, functional analysis and applications. Proceedings of the 30th international workshop on operator theory and its applications, IWOTA 2019, Lisbon, Portugal, July 22–26, 2019. Cham: Birkhäuser. Oper. Theory: Adv. Appl. 282, 293-315 (2021).
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### On best approximations to compact operators. (English)Zbl 1483.46015

MSC:  46B28 46B20
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### Time-variant system approximation via later-time samples. (English)Zbl 07388329

Fasshauer, Gregory E. (ed.) et al., Approximation theory XVI. Proceedings of the international conference, Nashville, TN, USA, May 19–22, 2019. Cham: Springer. Springer Proc. Math. Stat. 336, 1-9 (2021).
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