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01 natural sciences 88 0101 mathematics 87 inequalities in approximation (bernstein, jackson, nikol'skii-type inequalities) 47 best approximation, chebyshev systems 32 rate of convergence, degree of approximation 25 applied mathematics 23 mehr ... approximation by polynomials 22 analysis 21 approximation by positive operators 19 interpolation in approximation theory 19 numerical analysis 19 mathematics(all) 18 approximation by operators (in particular, by integral operators) 14 best constants 14 modulus of continuity 14 multidimensional problems 13 spline approximation 13 trigonometric approximation 12 inequalities involving derivatives and differential and integral operators 10 inequalities for trigonometric functions and polynomials 8 abstract approximation theory (approximation in normed linear spaces and other abstract spaces) 7 orthogonal polynomials and functions of hypergeometric type (jacobi, laguerre, hermite, askey scheme, etc.) 7 4. education 6 approximation by rational functions 6 inequalities for sums, series and integrals 6 real polynomials: analytic properties, etc 6 asymptotic approximations, asymptotic expansions (steepest descent, etc.) 5 bernstein operators 5 best uniform approximation 5 orthogonal polynomials 5 weniger ...

springer science and business media llc 33 elsevier bv 25 allerton press, inc., new york 8 american mathematical society (ams) 6 darba, sofia 6 springer us, new york, ny; pleiades publishing, new york, ny; maik ``nauka/interperiodica'', moscow 6 mehr ... steklov mathematical institute 6 american mathematical society (ams), providence, ri 5 cambridge university press (cup) 4 jstor 4 russian academy of sciences - ras (rossiiskaya akademiya nauk - ran), v. a. steklov mathematical institute (matematicheskii institut im. v. a. steklova), moscow; nauka, moscow 4 bulgarian academy of sciences - bas (balgarska akademiya na naukite - ban), sofia 3 international press of boston 3 nanjing university, nanjing; kluwer academic publishers, dordrecht 3 society for industrial & applied mathematics (siam) 3 taylor \& francis, philadelphia, pa 3 university of nis, faculty of electronic engineering, department of mathematics, nis 3 academia canaria de ciencias, la laguna, tenerife 2 academia sinica, institute of mathematics, beijing; chinese mathematical society, beijing 2 dalian university of science and technology, dalian 2 kazan (volga region) federal university (kazanskii (privolzhskii) federal'nyi universitet), kazan 2 leningrad university press, leningrad 2 national academy of sciences of ukraine - nas ukraine (natsional'na akademiya nauk ukraiiny - nan ukrainy), institute of mathematics (instytut matematyky), kiev 2 polish academy of sciences (polska akademia nauk - pan), institute of mathematics (instytut matematyczny), warsaw 2 springer us, new york, ny; pleiades publishing (allerton press), new york, ny; maik ``nauka/interperiodica'', moscow 2 yaroslavskii gosudarstvennyi universitet, yaroslavl' 2 academia romana filiala cluj 1 akademiai kiado zrt. 1 akademiai kiado, budapest 1 applied probability trust, university of sheffield, sheffield 1 weniger ...

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