## Found 391 Documents (Results 1–100)

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### Strong converse inequality for linear combinations of Szász-Mirakjan operators. (English)Zbl 07436518

MSC:  41A17 41A27
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### Direct, inverse, and equivalence theorems for weighted Szász-Durrmeyer-Bézier operators in Orlicz spaces. (English)Zbl 07393070

MSC:  41A35 41A17 41A27
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### Direct and inverse approximation theorems of functions in the Musielak-Orlicz type spaces. (English)Zbl 1466.41008

MSC:  41A27 41A44 42A16
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### Strong converse result for weighted approximation by Baskakov-Kantorovich operator. (English)Zbl 1460.41013

Draganov, Borislav (ed.) et al., Constructive theory of functions. Proceedings of the 13th international conference, Sozopol, Bulgaria, June 2–8, 2019. Dedicated to the memory of Blagovest Sendov. Sofia: Prof. Marin Drinov Academic Publishing House. 53-71 (2020).
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### Converse estimates for the simultaneous approximation by Bernstein polynomials with integer coeffcients. (English)Zbl 1460.41009

Draganov, Borislav (ed.) et al., Constructive theory of functions. Proceedings of the 13th international conference, Sozopol, Bulgaria, June 2–8, 2019. Dedicated to the memory of Blagovest Sendov. Sofia: Prof. Marin Drinov Academic Publishing House. 39-51 (2020).
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### Direct and inverse approximation theorems in the weighted Orlicz-type spaces with a variable exponent. (English)Zbl 1448.41013

MSC:  41A27 42A05 42A16
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### Constructive description of Hölder-like classes on an arc in $$\mathbb{R}^3$$ by means of harmonic functions. (English)Zbl 1429.41014

MSC:  41A30 41A27
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### Equivalent theorem of approximation by linear combination of weighted Baskakov-Kantorovich operators in Orlicz spaces. (English)Zbl 07459251

MSC:  41A17 41A27 41A35
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MSC:  41A27
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### On weighted approximation with Jacobi weights. (English)Zbl 1401.41007

MSC:  41A10 41A27
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### Strong converse inequalities for the weighted multivariate Bernstein-Durrmeyer operator on the simplex via multipliers. (English)Zbl 1474.41031

MSC:  41A27 41A36
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### Approximation of functions by some exponential-type operators. (English)Zbl 1445.41013

Ivanov, Kamen (ed.) et al., Constructive theory of functions. Proceedings of the 12th international conference, Sozopol, Bulgaria, June 11–17, 2016. Sofia: Prof. Marin Drinov Academic Publishing House. 143-158 (2018).
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### An exact strong converse inequality for the weighted simultaneous approximation by the Bernstein operator. (English)Zbl 1445.41011

Ivanov, Kamen (ed.) et al., Constructive theory of functions. Proceedings of the 12th international conference, Sozopol, Bulgaria, June 11–17, 2016. Sofia: Prof. Marin Drinov Academic Publishing House. 75-97 (2018).
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### Equivalent theorems of approximation by weighted Szasz-Kantorovich-Bezier operators in Orlicz spaces. (English)Zbl 1424.41030

MSC:  41A35 41A17 41A27
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### Convolution and Jackson inequalities in Musielak-Orlicz spaces. (English)Zbl 1424.42003

MSC:  42A10 41A25 41A27
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### Some inverse and simultaneous approximation theorems in weighted variable exponent Lebesgue spaces. (English)Zbl 1438.41021

MSC:  41A27 42A10
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### Direct and inverse results on bounded domains for meshless methods via localized bases on manifolds. (English)Zbl 1405.41009

Dick, Josef (ed.) et al., Contemporary computational mathematics – a celebration of the 80th birthday of Ian Sloan. In 2 volumes. Cham: Springer (ISBN 978-3-319-72455-3/hbk; 978-3-319-72456-0/ebook). 517-543 (2018).
MSC:  41A27 41A17 53C20
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### Approximation of Lupas-Baskakov operators strong converse inequality in Orlicz space. (Chinese. English summary)Zbl 1413.41010

MSC:  41A35 41A17 41A27
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### An inverse theorem for compact Lipschitz regions in $$\mathbb {R}^d$$ using localized kernel bases. (English)Zbl 1392.41009

MSC:  41A17 41A27 41A63
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### The analogue of Bernstein’s inverse theorem for the one class of the space of sequences. (Ukrainian. English summary)Zbl 1421.46005

MSC:  46A45 41A27
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### Approximation by entire functions on countable unions of segments of the real axis. II: Proof of the main theorem. (English. Russian original)Zbl 1382.41007

Vestn. St. Petersbg. Univ., Math. 50, No. 1, 35-43 (2017); translation from Vestn. St-Peterbg. Univ., Ser. I, Mat. Mekh. Astron. 62, No. 1, 53-63 (2017).
MSC:  41A10 30E10 41A27
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MSC:  41A27
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### Generalized derivatives and approximation in weighted Lorentz spaces. (English)Zbl 1375.41011

MSC:  41A25 41A27 42A10
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### Approximation with positive linear operators and linear combinations. (English)Zbl 1371.41035

Developments in Mathematics 50. Cham: Springer (ISBN 978-3-319-58794-3/hbk; 978-3-319-58795-0/ebook). xiii, 186 p. (2017).
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### Recursive computation of generalised Zernike polynomials. (English)Zbl 1350.41013

MSC:  41A21 41A27 42C05
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### Approximation for a generalization of Bernstein operators. (English)Zbl 1346.41002

MSC:  41A25 41A27 41A36
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Hardin, Douglas P. (ed.) et al., Modern trends in constructive function theory. Constructive functions 2014 conference in honor of Ed Saff’s 70th birthday, Vanderbilt University, Nashville, TN, USA, May 26–30, 2014. Proceedings. Providence, RI: American Mathematical Society (AMS) (ISBN 978-1-4704-2534-0/pbk; 978-1-4704-2934-8/ebook). Contemporary Mathematics 661, 141-151 (2016).
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### Improved direct and converse theorems in weighted Lorentz spaces. (English)Zbl 1342.41020

MSC:  41A25 41A27 42A10
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### Uniform polynomial approximation with $$A^{\ast}$$ weights having finitely many zeros. (English)Zbl 1337.30051

MSC:  30E10 41A10 41A27
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### Polynomial approximation with doubling weights. (English)Zbl 1363.41011

MSC:  41A10 41A17 41A27
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### Direct and inverse theorems on the approximation of functions by Fourier-Laplace sums in the spaces $$S^{(p,q)}(\sigma^m)$$. (English. Russian original)Zbl 1339.41023

Math. Notes 98, No. 4, 601-612 (2015); translation from Mat. Zametki 98, No. 4, 530-543 (2015).
MSC:  41A27 42B37
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### Direct and inverse theorems on approximation by piecewise polynomial functions. (English. Russian original)Zbl 1334.41018

J. Math. Sci., New York 209, No. 1, 96-107 (2015); translation from Fundam. Prikl. Mat. 18, No. 5, 129-144 (2013).
MSC:  41A27 41A10
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### Strong converse inequality for left Bernstein-Durrmeyer quasi-interpolants. (English)Zbl 1334.41017

MSC:  41A27 41A40
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### Inverse theorem on row sequences of linear Padé-orthogonal approximation. (English)Zbl 1336.30058

MSC:  30E10 41A27 41A21
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### Jackson-Stechkin type inequality in weighted Lorentz spaces. (English)Zbl 1329.41018

MSC:  41A25 41A27 42A10
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### Polynomial approximation with doubling weights having finitely many zeros and singularities. (English)Zbl 1323.41007

MSC:  41A10 41A27
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### Natural weights for uniform approximation by the Szász-Mirakjan operator. (English)Zbl 1423.41032

Ivanov, Kamen (ed.) et al., Constructive theory of functions. Dedicated to Blagovest Sendov and to the memory of Vasil Popov. Proceedings of the 11th international conference, Sozopol, Bulgaria, June 9–14, 2013. Sofia: Prof. Marin Drinov Academic Publishing House. 57-82 (2014).
MSC:  41A36 41A25 41A27

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### Pointwise approximation for a type of Bernstein-Durrmeyer operators. (English)Zbl 1372.41008

MSC:  41A25 41A27 41A36
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MSC:  41A27
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### On the approximation for generalized Szász-Durrmeyer type operators in the space $$L_p[0, \infty)$$. (English)Zbl 1334.41034

MSC:  41A36 41A25 41A27
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### Approximations of generalized Bernstein operators. (English)Zbl 1313.41039

MSC:  41A27 41A36
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### Pointwise approximation for a generalization of Bernstein-Kantorovich operators. (Chinese. English summary)Zbl 1313.41054

MSC:  41A36 41A25 41A27
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### Geometric series of positive linear operators and the inverse Voronovskaya theorem on a compact interval. (English)Zbl 1295.41018

MSC:  41A36 41A27 41A35
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### An inverse theorem in simultaneous approximation for a linear combination of Bernstein-Durrmeyer type polynomials. (English)Zbl 1340.41020

MSC:  41A28 41A27 41A36

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