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Found 591 Documents (Results 1–100)

Fundamental functions for local interpolation of quadrilateral meshes with extraordinary vertices. (English) Zbl 1522.41003

Ann. Univ. Ferrara, Sez. VII, Sci. Mat. 68, No. 2, 369-383 (2022); correction ibid. 69, No. 2, 615-618 (2023).
MSC:  41A15 65D05 65M50
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Estimates of solutions to infinite systems of linear equations and the problem of interpolation by cubic splines on the real line. (English. Russian original) Zbl 1516.41008

Sib. Math. J. 63, No. 4, 677-690 (2022); translation from Sib. Mat. Zh. 63, No. 4, 814-830 (2022).
MSC:  41A15 15A99 65D15
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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 1489.41001

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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Chebyshev approximation of multivariable functions by the exponential expression. (English. Ukrainian original) Zbl 1470.41031

Cybern. Syst. Anal. 57, No. 3, 429-435 (2021); translation from Kibern. Sist. Anal. 57, No. 3, 106-113 (2021).
MSC:  41A63 41A10 65D15
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Error optimization in the operators of interlineation of functions on \(M\) parallel lines. (English. Ukrainian original) Zbl 1470.41033

Cybern. Syst. Anal. 57, No. 2, 214-222 (2021); translation from Kibern. Sist. Anal. 57, No. 2, 52-61 (2021).
MSC:  41A65
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Approximation of the derivatives of a function in Lagrange interpolation on low-dimensional simplices. (English. Russian original) Zbl 1464.41001

Proc. Steklov Inst. Math. 312, 261-269 (2021); translation from Tr. Mat. Inst. Steklova 312, 272-281 (2021).
MSC:  41A05 41A63
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Classes of convolutions with a singular family of kernels: sharp constants for approximation by spaces of shifts. (English. Russian original) Zbl 1462.41005

St. Petersbg. Math. J. 32, No. 2, 233-260 (2021); translation from Algebra Anal. 32, No. 2, 45-84 (2020).
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Optimal subspaces for mean square approximation of classes of differentiable functions on a segment. (English. Russian original) Zbl 1458.41005

Vestn. St. Petersbg. Univ., Math. 53, No. 3, 270-281 (2020); translation from Vestn. St-Peterbg. Univ., Ser. I, Mat. Mekh. Astron. 7(65), No. 3, 404-417 (2020).
MSC:  41A15
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A sharp Jackson-Chernykh type inequality for spline approximations on the line. (English. Russian original) Zbl 1458.41004

Vestn. St. Petersbg. Univ., Math. 53, No. 1, 10-19 (2020); translation from Vestn. St-Peterbg. Univ., Ser. I, Mat. Mekh. Astron. 7(65), No. 1, 15-27 (2020).
MSC:  41A15
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Analogs of the Riesz identity, and sharp inequalities for derivatives and differences of splines in the integral metric. (English. Russian original) Zbl 1452.41017

J. Math. Sci., New York 251, No. 2, 215-226 (2020); translation from Zap. Nauchn. Semin. POMI 480, 86-102 (2019).
MSC:  41A65
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Generalized spline interpolation of functions with large gradients in boundary layers. (English. Russian original) Zbl 1451.41002

Comput. Math. Math. Phys. 60, No. 3, 411-426 (2020); translation from Zh. Vychisl. Mat. Mat. Fiz. 60, No. 3, 413-428 (2020).
MSC:  41A15
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Quadratic minimal splines with multiple nodes. (English. Russian original) Zbl 1448.41007

J. Math. Sci., New York 249, No. 2, 256-262 (2020); translation from Zap. Nauchn. Semin. POMI 482, 220-230 (2019).
MSC:  41A15
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Quantitative estimates for sampling type operators with respect to the Jordan variation. (English) Zbl 1446.41008

MSC:  41A25 41A05 94A20
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