EuDML | Browse

Items

All a b c d e f g h i j k l m n o p q r s t u v w x y z Other

Page 1 Next

Displaying 1 – 20 of 21

On a Problem of Best Uniform Approximation and a Polynomial Inequality of Visser

M. A. Qazi (2014)

Bulletin of the Polish Academy of Sciences. Mathematics

In this paper, a generalization of a result on the uniform best approximation of α cos nx + β sin nx by trigonometric polynomials of degree less than n is considered and its relationship with a well-known polynomial inequality of C. Visser is indicated.

On approximation of functions by generalized Abel--Poisson operators.

Falaleev, L.P. (2001)

Sibirskij Matematicheskij Zhurnal

On Besov-Hardy-Sobolev spaces of analytic functions in the unit disc

Patrick Oswald (1983)

Czechoslovak Mathematical Journal

On convergence of greedy approximations for the trigonometric system.

Konyagin, Sergei V. (2007)

Banach Journal of Mathematical Analysis [electronic only]

On converse theorems of trigonometric approximation in weighted variable exponent Lebesgue spaces.

Akgün, Ramazan, Kokilashvili, Vakhtang (2011)

Banach Journal of Mathematical Analysis [electronic only]

On counterexamples in multivariate approximation

R. J. Nessel, E. van-Wickeren (1989)

Banach Center Publications

On equivalence question between the Ditzian-Totik modulus of smoothness and an usual periodic modulus of smoothness.

Gal, Sorin (1998)

General Mathematics

On fractional derivatives

Helena Musielak (1973)

Colloquium Mathematicae

On Jackson type inequality in Orlicz classes.

Konstantin Runovski (2001)

Revista Matemática Complutense

It is shown that Jackson type inequality fails in the Orlicz classes φ(L) if φ(x) differs essentially from a power function of any order.

On Representations of Algebraic Polynomials by Superpositions of Plane Waves

Oskolkov, K. (2002)

Serdica Mathematical Journal

* The author was supported by NSF Grant No. DMS 9706883.Let P be a bi-variate algebraic polynomial of degree n with the real senior part, and Y = {yj }1,n an n-element collection of pairwise noncolinear unit vectors on the real plane. It is proved that there exists a rigid rotation Y^φ of Y by an angle φ = φ(P, Y ) ∈ [0, π/n] such that P equals the sum of n plane wave polynomials, that propagate in the directions ∈ Y^φ .

Considering the class of almost periodic functions integrable in the Stepanov sense we extend and generalize certain results of the first author, as well as of L. Leindler and P. Chandra.

Currently displaying 1 – 20 of 21

Page 1 Next

Displaying 1 – 20 of 21

On a Problem of Best Uniform Approximation and a Polynomial Inequality of Visser

On approximation of functions by generalized Abel--Poisson operators.

On Besov-Hardy-Sobolev spaces of analytic functions in the unit disc

On convergence of greedy approximations for the trigonometric system.

On converse theorems of trigonometric approximation in weighted variable exponent Lebesgue spaces.

On counterexamples in multivariate approximation

On equivalence question between the Ditzian-Totik modulus of smoothness and an usual periodic modulus of smoothness.

On fractional derivatives

On Jackson type inequality in Orlicz classes.

On Representations of Algebraic Polynomials by Superpositions of Plane Waves

On the approximation of function by Robel matrix

On the comparison of trigonometric convolution operators with their discrete analogues for Riemann integrable functions.

On the degree of approximation by Gauss Weierstrass integrals.

On the Degree of Approximation by the Operators of de la Vallée Poussin.

On the degree of strong approximation of continuous functions by special matrix.

On the degree of strong approximation of integrable functions in Stepanov sense

On the method of approximation by families of linear polynomial operators.

On the rate of pointwise summability of Fourier series.

On the rate of strong summability by matrix means in the generalized Hölder metric.

On the strong summability and approximation of Fourier series

Currently displaying 1 – 20 of 21