Approximation of periodic functions of two variables by Vall�e-Poussin sums

Ukrainian Mathematical Journal ◽

10.1007/bf01130626 ◽

1978 ◽

Vol 30 (1) ◽

pp. 23-31 ◽

Author(s):

P. V. Zaderei ◽

A. I. Stepanets

Keyword(s):

Periodic Functions ◽

Functions Of Two Variables ◽

Approximation Of Periodic Functions

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Estimation of the best approximation of periodic functions of two variables by an “angle” in the metric of L p

Ukrainian Mathematical Journal ◽

10.1007/s11253-005-0124-8 ◽

2004 ◽

Vol 56 (9) ◽

pp. 1403-1416 ◽

Author(s):

T. O. Kononovych

Keyword(s):

Best Approximation ◽

Periodic Functions ◽

The Best Approximation ◽

Functions Of Two Variables ◽

Approximation Of Periodic Functions

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On the best approximation of periodic functions of two variables by polynomial splines

Ukrainian Mathematical Journal ◽

10.1007/bf02514136 ◽

2000 ◽

Vol 52 (1) ◽

pp. 55-61

Author(s):

N. P. Korneichuk

Keyword(s):

Best Approximation ◽

Polynomial Splines ◽

Periodic Functions ◽

The Best Approximation ◽

Functions Of Two Variables ◽

Approximation Of Periodic Functions

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Approximation of Periodic Functions of Bounded Variation by Some Positive Linear Operators

Numerical Functional Analysis and Optimization ◽

10.1080/01630563.2021.1936020 ◽

2021 ◽

pp. 1-15

Author(s):

Jorge Bustamante

Keyword(s):

Bounded Variation ◽

Linear Operators ◽

Positive Linear Operators ◽

Functions Of Bounded Variation ◽

Periodic Functions ◽

Approximation Of Periodic Functions

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Cubature formulas of Hermite type in the space of periodic functions of two variables

10.1063/5.0057255 ◽

2021 ◽

Author(s):

Farhod Nuraliev

Keyword(s):

Periodic Functions ◽

Cubature Formulas ◽

Functions Of Two Variables

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APPROXIMATION OF PERIODIC FUNCTIONS BY FEJÉR SUMS

Mathematics of the USSR-Izvestiya ◽

10.1070/im1971v005n01abeh001014 ◽

1971 ◽

Vol 5 (1) ◽

pp. 86-96

Author(s):

G K Lebed' ◽

A A Avdeenko

Keyword(s):

Periodic Functions ◽

Approximation Of Periodic Functions

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Some problems of approximation of periodic functions by trigonometric polynomials in L2

Чебышевский сборник ◽

10.22405/2226-8383-2019-20-4-349-362 ◽

2019 ◽

Vol 20 (4) ◽

pp. 349-362

Author(s):

Mirgand Shabozovich Shabozov

Keyword(s):

Trigonometric Polynomials ◽

Periodic Functions ◽

Approximation Of Periodic Functions

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On extremal subspaces and approximation of periodic functions by splines of minimal defect

Analysis Mathematica ◽

10.1007/bf01903942 ◽

1975 ◽

Vol 1 (2) ◽

pp. 91-101 ◽

Author(s):

N. P. Korneičuk

Keyword(s):

Periodic Functions ◽

Minimal Defect ◽

Approximation Of Periodic Functions

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Chapter 5. Direct theorems on the approximation of periodic functions

Theory of Uniform Approximation of Functions by Polynomials ◽

10.1515/9783110208245.331 ◽

2008 ◽

Keyword(s):

Periodic Functions ◽

Approximation Of Periodic Functions

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Second Jackson Inequality in a Sign-Preserving Approximation of Periodic Functions

Ukrainian Mathematical Journal ◽

10.1023/b:ukma.0000031710.44467.5e ◽

2004 ◽

Vol 56 (1) ◽

pp. 153-160 ◽

Author(s):

M. G. Pleshakov ◽

P. A. Popov

Keyword(s):

Jackson Inequality ◽

Periodic Functions ◽

Approximation Of Periodic Functions

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Approximation of almost periodic functions of two variables

Russian Mathematics ◽

10.3103/s1066369x1012008x ◽

2010 ◽

Vol 54 (12) ◽

pp. 72-75 ◽

Author(s):

Yu. Kh. Khasanov

Keyword(s):

Almost Periodic Functions ◽

Almost Periodic ◽

Periodic Functions ◽

Functions Of Two Variables

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