Wahba Gobran, Aida On cubature formulae of rectangles. (English) Zbl 0572.41016 Proc. Math. Phys. Soc. Egypt 52, 19-27 (1981). MSC: 41A55 41A25 PDFBibTeX XMLCite \textit{A. Wahba Gobran}, Proc. Math. Phys. Soc. Egypt 52, 19--27 (1981; Zbl 0572.41016)
Chen, Tianping On the error bounds of splines. (Chinese. English summary) Zbl 0566.41016 Fudan J., Nat. Sci. 20, 15-22 (1981). MSC: 41A15 41A25 PDFBibTeX XMLCite \textit{T. Chen}, Fudan J., Nat. Sci. 20, 15--22 (1981; Zbl 0566.41016)
Liang, Xuezhang A note on spline interpolation formulas with high exactness. (Chinese. English summary) Zbl 0566.41005 Numer. Math., Nanjing 3, 83-87 (1981). MSC: 41A05 41A15 41A25 PDFBibTeX XMLCite \textit{X. Liang}, Numer. Math., Nanjing 3, 83--87 (1981; Zbl 0566.41005)
Sikkema, P. C. Fast approximation by means of convolution operators. (English) Zbl 0545.41024 Indag. Math. 43, 431-444 (1981). Reviewer: M.Nashed MSC: 41A35 41A30 41A36 41A25 PDFBibTeX XMLCite \textit{P. C. Sikkema}, Indag. Math. 43, 431--444 (1981; Zbl 0545.41024)
Sevas’tyanov, E. A. The degree of rational approximation of functions and their differentiability. (English) Zbl 0536.41020 Math. USSR, Izv. 17, 595-600 (1981). MSC: 41A20 41A25 26B05 PDFBibTeX XMLCite \textit{E. A. Sevas'tyanov}, Math. USSR, Izv. 17, 595--600 (1981; Zbl 0536.41020) Full Text: DOI
Butzer, Paul L.; Hahn, L.; Roeckerath, M. Th. Stable limit law and weak law of large numbers for Hilbert space with ”large-\({\mathcal O}''\) rates. (English) Zbl 0533.60030 Contributions to probability, Collect. Pap. dedic. E. Lukacs, 77-100 (1981). MSC: 60F05 60G50 60B12 41A25 PDFBibTeX XML
Pinkus, A. Bernstein’s comparison theorem and a problem of Braess. (English) Zbl 0533.41021 Aequationes Math. 23, 98-107 (1981). Reviewer: L.Leindler MSC: 41A50 41A15 41A25 PDFBibTeX XMLCite \textit{A. Pinkus}, Aequationes Math. 23, 98--107 (1981; Zbl 0533.41021) Full Text: DOI EuDML
Sikkema, P. C.; van der Meer, P. J. C.; Roos, Maria Determination of the exact degree of local approximation by some linear positive operators involving the modulus of continuity of the p-th derivative. (English) Zbl 0533.41019 Indag. Math. 43, 117-128 (1981). Reviewer: L.Hahn MSC: 41A36 41A25 PDFBibTeX XMLCite \textit{P. C. Sikkema} et al., Indag. Math. 43, 117--128 (1981; Zbl 0533.41019)
Chakhkiev, M. A. Exponential polynomials deviating least from zero and optimal quadrature formulas. (English. Russian original) Zbl 0532.41036 Sov. Math., Dokl. 24, 443-447 (1981); translation from Dokl. Akad. Nauk SSSR 260, 1309-1312 (1981). Reviewer: M.A.Jimenez MSC: 41A55 41A50 41A25 PDFBibTeX XMLCite \textit{M. A. Chakhkiev}, Sov. Math., Dokl. 24, 443--447 (1981; Zbl 0532.41036); translation from Dokl. Akad. Nauk SSSR 260, 1309--1312 (1981)
G”rnevska, L. V. On the rate of approximation of functions by \((c,\alpha>0)\)-means of their orthogonal expansions. (Bulgarian. German, Russian summaries) Zbl 0531.41026 God. Vissh. Uchebn. Zaved., Prilozhna Mat. 16(1980), No. 2, 161-180 (1981). Reviewer: V.A.Baskakov MSC: 41A60 41A25 PDFBibTeX XMLCite \textit{L. V. G''rnevska}, God. Vissh. Uchebn. Zaved., Prilozh. Mat. 16, No. 2, 161--180 (1981; Zbl 0531.41026)
Wehrens, Matthias Best approximation on the unit sphere in \(R^ k\). (English) Zbl 0529.41024 Functional analysis and approximation, Proc. Conf., Oberwolfach 1980, ISNM 60, 233-245 (1981). MSC: 41A50 41A25 41A30 41A65 PDFBibTeX XML
Richter, Wieland Ein Konstruktionsverfahren für optimale singuläre Faltungsintegrale mit periodischen Kernen endlicher Oszillation. (German) Zbl 0527.41011 Mathematisch-Naturwissenschaftliche Fakultät der Rheinisch-Westfälischen Technischen Hochschule Aachen. 91 S. (1981). MSC: 41A35 41A25 PDFBibTeX XML
Ivanov, Kamen G. One-sided algebraical approximation on the real axis with the weight \(\exp\{-x^ 2\}\). (English) Zbl 0526.41015 Serdica 7, 57-65 (1981). MSC: 41A17 41A25 41A10 41A27 PDFBibTeX XMLCite \textit{K. G. Ivanov}, Serdica 7, 57--65 (1981; Zbl 0526.41015)
Velikin, V. L. On an asymptotic connection between the approximation of periodic functions by splines and by trigonometric polynomials. (English. Russian original) Zbl 0523.41007 Sov. Math., Dokl. 23, 540-544 (1981); translation from Dokl. Akad. Nauk SSSR 258, 525-529 (1981). MSC: 41A15 41A25 42A10 41A05 41A50 PDFBibTeX XMLCite \textit{V. L. Velikin}, Sov. Math., Dokl. 23, 540--544 (1981; Zbl 0523.41007); translation from Dokl. Akad. Nauk SSSR 258, 525--529 (1981)
Lutterodt, Clement H. On uniform convergence for (mu,nu)-type rational approximants in \(C^ n.\) II. (English) Zbl 0515.32001 Int. J. Math. Math. Sci. 4, 655-660 (1981). MSC: 32A15 41A20 41A25 PDFBibTeX XMLCite \textit{C. H. Lutterodt}, Int. J. Math. Math. Sci. 4, 655--660 (1981; Zbl 0515.32001) Full Text: DOI EuDML
Davidchik, A. N.; Ligun, A. A. Precise constants in inequalities of Jackson type. (English) Zbl 0511.42002 Math. Notes 29, 388-393 (1981). MSC: 42A05 41A25 41A17 PDFBibTeX XMLCite \textit{A. N. Davidchik} and \textit{A. A. Ligun}, Math. Notes 29, 388--393 (1981; Zbl 0511.42002) Full Text: DOI
Singh, Suresh Prasad On the degree of approximation by Szasz operators. (English) Zbl 0511.41027 Bull. Aust. Math. Soc. 24, 221-225 (1981). MSC: 41A36 41A25 PDFBibTeX XMLCite \textit{S. P. Singh}, Bull. Aust. Math. Soc. 24, 221--225 (1981; Zbl 0511.41027) Full Text: DOI
Videnskij, V. S. Approximation by Bernstein-type operators. (English) Zbl 0509.41009 Sov. J. Contemp. Math. Anal., Arm. Acad. Sci. 16, No. 2, 18-26 (1981). MSC: 41A36 41A25 PDFBibTeX XMLCite \textit{V. S. Videnskij}, Sov. J. Contemp. Math. Anal., Arm. Acad. Sci. 16, No. 2, 18--26 (1981; Zbl 0509.41009)
Belen’kij, A. M. On the expansion of functions in the Fourier-Jacobi series. (Russian) Zbl 0508.42027 Constructive function theory and representation theory, Collect. sci. Works, Kiev 1981, 35-48 (1981). MSC: 42C10 41A58 33C45 41A10 41A25 PDFBibTeX XML
Becker, Michael Inverse theorems for Favard operators in polynomial weight spaces. (English) Zbl 0508.41017 Ann. Soc. Math. Pol., Ser. I, Commentat. Math. 22, 165-173 (1981). MSC: 41A27 41A65 41A25 PDFBibTeX XMLCite \textit{M. Becker}, Ann. Soc. Math. Pol., Ser. I, Commentat. Math. 22, 165--173 (1981; Zbl 0508.41017)
Ciesielski, Zbigniew Spline approximation and Besov spaces on compact manifolds. (English) Zbl 0508.41011 Prepr., Inst. Math., Pol. Acad. Sci., Warsz. 239, 44 p. (1981). MSC: 41A15 41A65 46E35 41A05 41A17 41A25 41A35 65D05 65D07 PDFBibTeX XML
Volokhin, V. A. Approximations of functions represented by singular integrals on a sphere. (English) Zbl 0507.41008 Sov. Math. 25, No. 4, 88-92 (1981). MSC: 41A10 41A25 42A50 PDFBibTeX XMLCite \textit{V. A. Volokhin}, Sov. Math. 25, No. 4, 88--92 (1981; Zbl 0507.41008)
Tashev, Sp. On the distribution of the points of maximal deviation for the polynomials of best Chebyshev and Hausdorff approximations. (English) Zbl 0506.41024 Approximation and function spaces, Proc. int. Conf., Gdansk 1979, 791-799 (1981). MSC: 41A50 41A25 42A10 PDFBibTeX XML
Shvedov, A. S. Orders of coapproximation of functions by algebraic polynomials. (English) Zbl 0506.41004 Math. Notes 29, 63-70 (1981). MSC: 41A10 41A25 41A50 PDFBibTeX XMLCite \textit{A. S. Shvedov}, Math. Notes 29, 63--70 (1981; Zbl 0506.41004) Full Text: DOI
Chisalita, Florica Elena Interpolation d’Hermite-Fejer sur des nœuds quadruples - racines des polynômes d’Hermite. (French) Zbl 0506.41001 Stud. Univ. Babes-Bolyai, Math. 26, No. 4, 40-45 (1981). MSC: 41A05 41A25 PDFBibTeX XMLCite \textit{F. E. Chisalita}, Stud. Univ. Babeș-Bolyai, Math. 26, No. 4, 40--45 (1981; Zbl 0506.41001)
Golubov, B. I. On the rate of convergence of integrals of Gauss-Weierstrass type for functions of several variables. (English) Zbl 0506.40002 Math. USSR, Izv. 17, 455-475 (1981). MSC: 40A10 41A25 PDFBibTeX XMLCite \textit{B. I. Golubov}, Math. USSR, Izv. 17, 455--475 (1981; Zbl 0506.40002) Full Text: DOI
Khudainazarov, S. Kh. On the order of the approximation of functions of two variables for the Fourier-Jacobi expansion. (Russian) Zbl 0504.42002 Vopr. Vychisl. Prikl. Mat. 66, 94-100 (1981). MSC: 42A10 41A50 41A25 26A15 PDFBibTeX XMLCite \textit{S. Kh. Khudainazarov}, Vopr. Vychisl. Prikl. Mat. 66, 94--100 (1981; Zbl 0504.42002)
Goodenough, S. J.; Mills, T. M. Asymptotic estimates for quasi-Hermite-Fejer interpolation. (English) Zbl 0504.41001 Acta Math. Acad. Sci. Hung. 38, 151-155 (1981). MSC: 41A05 41A25 41A10 PDFBibTeX XMLCite \textit{S. J. Goodenough} and \textit{T. M. Mills}, Acta Math. Acad. Sci. Hung. 38, 151--155 (1981; Zbl 0504.41001) Full Text: DOI
Gavrilyuk, V. T. An asymptotic estimate for the deviation of trigonometrical interpolational polynomials with equally spaced nodes on the class of periodic functions. (Russian) Zbl 0502.42004 Investigations in the theory of approximation of functions, Collect. sci. Works, Kiev 1981, 6-19 (1981). MSC: 42A15 41A25 PDFBibTeX XML
Becker, M.; Nessel, R. J. On global saturation for Kantorovitch polynomials. (English) Zbl 0501.41017 Approximation and function spaces, Proc. int. Conf., Gdansk 1979, 89-101 (1981). MSC: 41A40 41A10 41A25 41A36 PDFBibTeX XML
Khan, Arman; Umar, S. On the order of approximation to a function by generalized Gauss Weierstrass singular integrals. (English) Zbl 0501.41012 Commun. Fac. Sci. Univ. Ankara, Sér. A1, Math. Stat. 30, 55-62 (1981). MSC: 41A25 41A30 42A50 41A35 PDFBibTeX XMLCite \textit{A. Khan} and \textit{S. Umar}, Commun. Fac. Sci. Univ. Ankara, Ser. A1, Math. Stat. 30, 55--62 (1981; Zbl 0501.41012)
Chandra, Prem On the degree of approximation of continuous functions. (English) Zbl 0499.42001 Commun. Fac. Sci. Univ. Ankara, Sér. A1, Math. Stat. 30, 7-16 (1981). MSC: 42A10 41A25 PDFBibTeX XMLCite \textit{P. Chandra}, Commun. Fac. Sci. Univ. Ankara, Ser. A1, Math. Stat. 30, 7--16 (1981; Zbl 0499.42001)
Karlsson, J.; Saff, E. B. Singularities of functions determined by the poles of Padé approximants. (English) Zbl 0499.41014 Pade approximation and its applications, Proc. Conf., Amsterdam 1980, Lect. Notes Math. 888, 239-254 (1981). MSC: 41A21 41A25 PDFBibTeX XML
Splettstoesser, Wolfgang Sampling series approximation of continuous weak sense stationary processes. (English) Zbl 0497.60032 Inf. Control 50, 228-241 (1981). MSC: 60G10 60G35 41A25 94A05 PDFBibTeX XMLCite \textit{W. Splettstoesser}, Inf. Control 50, 228--241 (1981; Zbl 0497.60032) Full Text: DOI
Vogelius, M.; Babuška, Ivo On a dimensional reduction method. II: Some approximation-theoretic results. (English) Zbl 0495.65050 Math. Comput. 37, 47-68 (1981). MSC: 65N30 65N15 41A25 35J25 65D15 PDFBibTeX XMLCite \textit{M. Vogelius} and \textit{I. Babuška}, Math. Comput. 37, 47--68 (1981; Zbl 0495.65050) Full Text: DOI
Vogelius, M.; Babuška, Ivo On a dimensional reduction method. I: The optimal selection of basis functions. (English) Zbl 0495.65049 Math. Comput. 37, 31-46 (1981). MSC: 65N30 65N15 41A25 65D15 35J25 PDFBibTeX XMLCite \textit{M. Vogelius} and \textit{I. Babuška}, Math. Comput. 37, 31--46 (1981; Zbl 0495.65049) Full Text: DOI
Shen, Xiechang The remainder estimation of the expansion by means of rational functions in \(E_ p(1<P\leq +\infty)\). (Chinese) Zbl 0495.41021 Chin. Ann. Math. 2, 301-310 (1981). MSC: 41A60 41A25 PDFBibTeX XMLCite \textit{X. Shen}, Chin. Ann. Math. 2, 301--310 (1981; Zbl 0495.41021)
Hsu, L. C.; Yang, Jiaxing Reducing-dimensionality expansions and boundary type cubature formulas having higher algebraic precision. (Chinese) Zbl 0495.41020 Numer. Math., Nanjing 3, 361-369 (1981). MSC: 41A55 41A25 PDFBibTeX XMLCite \textit{L. C. Hsu} and \textit{J. Yang}, Numer. Math., Nanjing 3, 361--369 (1981; Zbl 0495.41020)
Helfrich, Hans-Peter Simultaneous approximation in negative norms of arbitrary order. (English) Zbl 0495.41010 RAIRO, Anal. Numér. 15, 231-235 (1981). MSC: 41A28 41A25 41A50 PDFBibTeX XMLCite \textit{H.-P. Helfrich}, RAIRO, Anal. Numér. 15, 231--235 (1981; Zbl 0495.41010) Full Text: DOI EuDML
Kapoor, G. P.; Nautiyal, A. Polynomial approximation of an entire function of slow growth. (English) Zbl 0495.41005 J. Approximation Theory 32, 64-75 (1981). MSC: 41A10 41A25 30D15 41A50 PDFBibTeX XMLCite \textit{G. P. Kapoor} and \textit{A. Nautiyal}, J. Approx. Theory 32, 64--75 (1981; Zbl 0495.41005) Full Text: DOI
Zaĭtsev, A. Yu. On approximating the distributions of sums of independent terms by infinitely divisible laws in the Levy metric. (English. Russian original) Zbl 0494.60014 Sov. Math., Dokl. 24, 382-385 (1981); translation from Dokl. Akad. Nauk SSSR 260, 1058-1061 (1981). MSC: 60E07 60G50 41A25 PDFBibTeX XMLCite \textit{A. Yu. Zaĭtsev}, Sov. Math., Dokl. 24, 382--385 (1981; Zbl 0494.60014); translation from Dokl. Akad. Nauk SSSR 260, 1058--1061 (1981)
Bojanic, R.; Vuilleumier, M. On the rate of convergence of Fourier-Legendre series of functions of bounded variation. (English) Zbl 0494.42003 J. Approximation Theory 31, 67-79 (1981). MSC: 42A10 41A25 PDFBibTeX XMLCite \textit{R. Bojanic} and \textit{M. Vuilleumier}, J. Approx. Theory 31, 67--79 (1981; Zbl 0494.42003) Full Text: DOI
Khan, Arman; Umar, S. On the degree of approximation to a function by Gauss-Weierstrass singular integral. (English) Zbl 0494.41010 Tamkang J. Math. 12, 155-159 (1981). MSC: 41A25 42B20 41A35 41A36 41A30 PDFBibTeX XMLCite \textit{A. Khan} and \textit{S. Umar}, Tamkang J. Math. 12, 155--159 (1981; Zbl 0494.41010)
Guo, Zhurui On approximation constant for typical means. (English) Zbl 0493.42003 Kexue Tongbao, Foreign. Lang. Ed. 26, 1057-1060 (1981). MSC: 42A10 41A25 40G05 41A30 PDFBibTeX XMLCite \textit{Z. Guo}, Kexue Tongbao, Sci. Bull. 26, 1057--1060 (1981; Zbl 0493.42003)
Goodenough, S. J.; Mills, T. M. A new estimate for the approximation of functions by Hermite-Fejer interpolation polynomials. (English) Zbl 0493.41014 J. Approximation Theory 31, 253-260 (1981). MSC: 41A17 41A05 41A25 41A10 PDFBibTeX XMLCite \textit{S. J. Goodenough} and \textit{T. M. Mills}, J. Approx. Theory 31, 253--260 (1981; Zbl 0493.41014) Full Text: DOI
Becker, M.; Nessel, R. J. Some global direct estimates for Kantorovitch polynomials. (English) Zbl 0492.41012 Analysis 1, 117-127 (1981). MSC: 41A10 41A25 41A36 PDFBibTeX XMLCite \textit{M. Becker} and \textit{R. J. Nessel}, Analysis 1, 117--127 (1981; Zbl 0492.41012) Full Text: DOI
Vertesi, P. On the rough theory of Hermite-Fejer interpolation. (English) Zbl 0492.41004 Period. Math. Hung. 12, 293-299 (1981). MSC: 41A05 41A10 41A25 PDFBibTeX XMLCite \textit{P. Vertesi}, Period. Math. Hung. 12, 293--299 (1981; Zbl 0492.41004) Full Text: DOI
Qureshi, K. On the degree of approximation to a function belonging to weighted (\(L^ p,\)psi(t)) class by means of a conjugate series. (English) Zbl 0491.42004 J. M.A.C.T. 14, 59-64 (1981). MSC: 42A10 41A25 40G05 PDFBibTeX XMLCite \textit{K. Qureshi}, J. M.A.C.T. 14, 59--64 (1981; Zbl 0491.42004)
Sharma, P. L.; Qureshi, K. On the degree of approximation to a function belonging to weighted (\(L^ p,\)psi(t)) class. (English) Zbl 0491.42003 J. M.A.C.T. 14, 53-57 (1981). MSC: 42A10 41A25 40G05 41A65 PDFBibTeX XMLCite \textit{P. L. Sharma} and \textit{K. Qureshi}, J. M.A.C.T. 14, 53--57 (1981; Zbl 0491.42003)
Bajborodov, S. P. Approximation of functions of several variables by de la Vallee Poussin rectangular sums. (English. Russian original) Zbl 0491.42002 Math. Notes 29, 362-372 (1981); translation from Mat. Zametki 29, 711-730 (1981). MSC: 42A10 41A63 41A25 PDFBibTeX XMLCite \textit{S. P. Bajborodov}, Math. Notes 29, 362--372 (1981; Zbl 0491.42002); translation from Mat. Zametki 29, 711--730 (1981) Full Text: DOI
Pfeifer, E. Quadratic spline functions and two-point boundary value problems. (English) Zbl 0491.41014 Seminarber., Humboldt-Univ. Berlin, Sekt. Math. 32, 84-87 (1981). MSC: 41A15 41A25 34B10 41A05 PDFBibTeX XMLCite \textit{E. Pfeifer}, Seminarber., Humboldt-Univ. Berlin, Sekt. Math. 32, 84--87 (1981; Zbl 0491.41014)
Baskakov, V. A. On the order of approximation and the norms of linear summation methods for Fourier series. (English) Zbl 0489.42014 Approximation and function spaces, Proc. int. Conf., Gdansk 1979, 68-88 (1981). MSC: 42A24 41A25 PDFBibTeX XML
Wronicz, Z. On approximation by analytic splines. (English) Zbl 0489.41014 Approximation and function spaces, Proc. int. Conf., Gdansk 1979, 867-879 (1981). MSC: 41A15 30E10 41A25 42A10 PDFBibTeX XML
Rivlin, Theodore J. An introduction to the approximation of functions. Corr. reprint of the 1969 orig. (English) Zbl 0489.41001 Dover Books on Advanced Mathematics. New York: Dover Publications, Inc. VIII, 150 p. $ 3.50 (1981). MSC: 41-01 41A20 41A10 65D15 41A30 41A36 41A25 41A05 41A15 PDFBibTeX XML
Ivanov, K. G. Some characterizations of the best algebraic approximation in \(L^ p[- 1,1]\) (\(1 \leq p \leq \infty\)). (English) Zbl 0488.41025 C. R. Acad. Bulg. Sci. 34, 1229-1232 (1981). MSC: 41A50 41A25 41A10 26A15 41A35 PDFBibTeX XMLCite \textit{K. G. Ivanov}, C. R. Acad. Bulg. Sci. 34, 1229--1232 (1981; Zbl 0488.41025)
Dzhumagulov, A. K. Diameters of classes of differentiable functions representable by trigonometric series with ”small” gaps. (Russian) Zbl 0488.41024 Differential equations and their applications, Collect. Artic., Alma-Ata 1981, 82-86 (1981). MSC: 41A46 41A25 PDFBibTeX XML
Gal, Sorin Gh. On the Weierstras’ approximation theorems. (Sur les théorèmes d’approximation de Weierstrass.) (French) Zbl 0488.41005 Math., Rev. Anal. Numér. Théor. Approximation, Math. 23(46), 25-30 (1981). Reviewer: Raoul François Gloden MSC: 41A10 26A16 42A10 40A30 41A25 26A15 PDFBibTeX XMLCite \textit{S. Gh. Gal}, Math. Rev. Anal. Numér. Théor. Approximation, Math. 23(46), 25--30 (1981; Zbl 0488.41005)
Misra, N. On the convergence of Hermite-Fejer and Hermite-Fejer type processes. (English) Zbl 0488.41002 Acta Math. Acad. Sci. Hung. 37, 383-389 (1981). MSC: 41A05 41A10 41A25 PDFBibTeX XMLCite \textit{N. Misra}, Acta Math. Acad. Sci. Hung. 37, 383--389 (1981; Zbl 0488.41002) Full Text: DOI
Tokareva, O. N. The estimates of the rate of convergence of algorithms based on barrier functions with the use of quadratic programming problems. (English. Russian original) Zbl 0487.90082 Cybernetics 17, 688-695 (1982); translation from Kibernetika 1981, No. 5, 107-112 (1981). MSC: 90C20 65K05 41A25 90C30 PDFBibTeX XMLCite \textit{O. N. Tokareva}, Cybernetics 17, 688--695 (1981; Zbl 0487.90082); translation from Kibernetika 1981, No. 5, 107--112 (1981)
Dahmen, W. Trigonometric approximation with exponential error orders. III: Criteria for asymptotically optimal processes. (English) Zbl 0487.42004 Approximation and function spaces, Proc. int. Conf., Gdansk 1979, 239-258 (1981). MSC: 42A10 41A25 41A50 42A20 PDFBibTeX XML
Bleimann, G.; Junggeburth, J.; Stark, E. L. Improved approximation and Jackson’s theorem. (English) Zbl 0487.41033 Approximation and function spaces, Proc. int. Conf., Gdansk 1979, 135-148 (1981). MSC: 41A50 41A25 41A35 42A16 41A17 PDFBibTeX XML
Golubov, B. I. Asymptotic behavior of singular multiple integrals for differentiable functions. (English. Russian original) Zbl 0487.41025 Math. Notes 30, 873-880 (1982); translation from Mat. Zametki 30, 749-762 (1981). MSC: 41A35 41A25 41A58 PDFBibTeX XMLCite \textit{B. I. Golubov}, Math. Notes 30, 873--880 (1981; Zbl 0487.41025); translation from Mat. Zametki 30, 749--762 (1981) Full Text: DOI
Goodenough, S. J.; Mills, T. M. On interpolation polynomials of the Hermite-Fejer type. II. (English) Zbl 0487.41003 Bull. Aust. Math. Soc. 23, 283-291 (1981). MSC: 41A05 41A25 41A10 PDFBibTeX XMLCite \textit{S. J. Goodenough} and \textit{T. M. Mills}, Bull. Aust. Math. Soc. 23, 283--291 (1981; Zbl 0487.41003) Full Text: DOI
Beohar, B. K.; Jadiya, B. L. Degree of approximation by Noerlund means of the Fourier-Laguerre expansion. (English) Zbl 0486.42010 Indian J. Pure Appl. Math. 12, 1114-1119 (1981). MSC: 42C10 41A25 40G05 PDFBibTeX XMLCite \textit{B. K. Beohar} and \textit{B. L. Jadiya}, Indian J. Pure Appl. Math. 12, 1114--1119 (1981; Zbl 0486.42010)
Taberski, R. Approximation connected with Bessel functions. (English) Zbl 0486.41012 Approximation and function spaces, Proc. int. Conf., Gdansk 1979, 755-770 (1981). MSC: 41A30 41A25 PDFBibTeX XML
Nicolcheva, M. G. Parametric approximation of convex functions. (English) Zbl 0486.41005 Approximation and function spaces, Proc. int. Conf., Gdansk 1979, 518-526 (1981). MSC: 41A10 41A25 PDFBibTeX XML
Nemeth, G. Notes on generalized Padé approximation. (English) Zbl 0485.41017 Approximation and function spaces, Proc. int. Conf., Gdansk 1979, 484-508 (1981). MSC: 41A21 41A20 41A25 33B10 41A50 PDFBibTeX XML
Nazarenko, N. A. On the local reconstruction of curves with the help of parametric splines. (Russian) Zbl 0485.41009 Geometric function theory and topology, Collect. sci. Works, Kiev 1981, 55-62 (1981). MSC: 41A15 41A25 PDFBibTeX XML
Wallin, H. Extensions of functions preserving moduli of smoothness. (English) Zbl 0485.41007 Approximation and function spaces, Proc. int. Conf., Gdansk 1979, 835-853 (1981). MSC: 41A10 41A25 46E35 41A65 46E15 26B35 PDFBibTeX XML
Klimenko, V. T. Construction of a generalized Hermitian interpolant in case of a bounded domain with piecewise smooth boundary. (Russian) Zbl 0484.41016 Dokl. Akad. Nauk Ukr. SSR, Ser. A 1981, No. 8, 23-26 (1981). MSC: 41A15 41A25 PDFBibTeX XMLCite \textit{V. T. Klimenko}, Dokl. Akad. Nauk Ukr. SSR, Ser. A 1981, No. 8, 23--26 (1981; Zbl 0484.41016)
Kornejchuk, N. P.; Ligun, A. A. On approximation of a class by another class and extremal subspaces in \(L_ 1\). (English) Zbl 0481.42004 Anal. Math. 7, 107-119 (1981). MSC: 42A10 41A65 41A30 41A25 PDFBibTeX XMLCite \textit{N. P. Kornejchuk} and \textit{A. A. Ligun}, Anal. Math. 7, 107--119 (1981; Zbl 0481.42004) Full Text: DOI
Stepanets, A. I. Uniform approximations by trigonometrical polynomials. Linear methods. (Ravnomernye priblizheniya trigonometricheskimi polinomami. Linejnye metody). (Russian) Zbl 0481.42001 Akademiya Nauk Ukrainskoj SSR. Ordena Trudovogo Krasnogo Znameni Institut Matematiki. Kiev: ”Naukova Dumka”. 340 p. R. 3.60 (1981). MSC: 42-01 42A10 41A35 41A36 42B99 41A25 42A05 PDFBibTeX XML
Kroo, A. Deviation of best discrete and uniform polynomial approximants. (English) Zbl 0481.41020 Anal. Math. 7, 121-130 (1981). MSC: 41A50 41A10 41A25 PDFBibTeX XMLCite \textit{A. Kroo}, Anal. Math. 7, 121--130 (1981; Zbl 0481.41020) Full Text: DOI
Khodak, L. B. Structural characteristics of some classes of functions in the metric of \(L^ p\) for \(0<p<1\). (English. Russian original) Zbl 0481.41006 Ukr. Math. J. 32, 287-293 (1981); translation from Ukr. Mat. Zh. 32, 423-431 (1980). MSC: 41A10 41A25 PDFBibTeX XMLCite \textit{L. B. Khodak}, Ukr. Math. J. 32, 287--293 (1981; Zbl 0481.41006); translation from Ukr. Mat. Zh. 32, 423--431 (1980) Full Text: DOI
New and unsolved problems. (English) Zbl 0481.41004 Functional analysis and approximation, Proc. Conf., Oberwolfach 1980, ISNM 60, 463-473 (1981). MSC: 41-02 41A05 42A10 41A65 46B25 41A25 42B30 PDFBibTeX XML
Dickmeis, W.; Nessel, R. J. On uniform boundedness principles and Banach-Steinhaus theorems with rates. (English) Zbl 0479.41034 Numer. Funct. Anal. Optimization 3, 19-52 (1981). MSC: 41A65 41A25 41A35 PDFBibTeX XMLCite \textit{W. Dickmeis} and \textit{R. J. Nessel}, Numer. Funct. Anal. Optim. 3, 19--52 (1981; Zbl 0479.41034) Full Text: DOI
Lehnhoff, Heinz-Gerd Local Nikolskii constants for a special class of Baskakov operators. (English) Zbl 0479.41017 J. Approximation Theory 33, 236-247 (1981). MSC: 41A36 41A25 41A44 41A60 PDFBibTeX XMLCite \textit{H.-G. Lehnhoff}, J. Approx. Theory 33, 236--247 (1981; Zbl 0479.41017) Full Text: DOI
Lehnhoff, Heinz-Gerd Local Nikolskii constants for positive linear operators. (English) Zbl 0478.41014 J. Approximation Theory 33, 224-235 (1981). MSC: 41A25 41A36 41A44 41A60 PDFBibTeX XMLCite \textit{H.-G. Lehnhoff}, J. Approx. Theory 33, 224--235 (1981; Zbl 0478.41014) Full Text: DOI
Pozo, Jimenez M. A. Convergence of sequences of linear functionals. (English) Zbl 0478.41013 Z. Angew. Math. Mech. 61, 495-500 (1981). MSC: 41A35 41A25 41A36 41A55 41A10 40A05 PDFBibTeX XMLCite \textit{J. M. A. Pozo}, Z. Angew. Math. Mech. 61, 495--500 (1981; Zbl 0478.41013) Full Text: DOI
Stepanets, A. I. Estimates of the deviations of partial Fourier sums on classes of continuous periodic functions of several variables. (English) Zbl 0477.42003 Math. USSR, Izv. 17, 369-403 (1981). MSC: 42A10 41A25 42A75 PDFBibTeX XMLCite \textit{A. I. Stepanets}, Math. USSR, Izv. 17, 369--403 (1981; Zbl 0477.42003) Full Text: DOI
Magnus, Alphonse Rate of convergence of sequences of Padé-type approximants and pole detection in the complex plane. (English) Zbl 0477.41016 Pade approximation and its applications, Proc. Conf., Amsterdam 1980, Lect. Notes Math. 888, 300-308 (1981). MSC: 41A21 41A25 30E10 PDFBibTeX XML
Borwein, Peter B. Approximation of \(x^ n\) by reciprocals of polynomials. (English) Zbl 0477.41014 J. Approximation Theory 32, 241-246 (1981). MSC: 41A20 41A25 PDFBibTeX XMLCite \textit{P. B. Borwein}, J. Approx. Theory 32, 241--246 (1981; Zbl 0477.41014) Full Text: DOI
Malozemov, V. N.; Pevnyj, A. B. A generalization of the snake theorem. (English) Zbl 0477.41008 Vestn. Leningr. Univ., Math. 13, 95-99 (1981). MSC: 41A10 41A25 PDFBibTeX XMLCite \textit{V. N. Malozemov} and \textit{A. B. Pevnyj}, Vestn. Leningr. Univ., Math. 13, 95--99 (1981; Zbl 0477.41008)
Sevast’yanov, E. A. On uniform approximation of functions by Fourier sums. (Russian) Zbl 0476.42002 Mat. Sb., N. Ser. 114(156), 583-610 (1981). MSC: 42A10 41A25 PDFBibTeX XMLCite \textit{E. A. Sevast'yanov}, Mat. Sb., Nov. Ser. 114(156), 583--610 (1981; Zbl 0476.42002) Full Text: EuDML
Chen, Tian-ping On some kinds of lacunary interpolation splines. (English) Zbl 0476.41005 Acta Math. Appl. Sin. 4, 253-257 (1981). MSC: 41A15 41A05 41A25 PDFBibTeX XMLCite \textit{T.-p. Chen}, Acta Math. Appl. Sin. 4, 253--257 (1981; Zbl 0476.41005)
Guliev, R. D. A cubature formula for a many-dimensional singular integral along a bounded domain. (Russian) Zbl 0475.42018 Dokl., Akad. Nauk Az. SSR 37, No. 4, 7-10 (1981). MSC: 42B20 41A55 41A25 PDFBibTeX XMLCite \textit{R. D. Guliev}, Dokl., Akad. Nauk Az. SSR 37, No. 4, 7--10 (1981; Zbl 0475.42018)
Stepanets, A. I. Sharp estimates for deviations of the Favard sums on classes of continuous periodic functions of two variables. (English) Zbl 0475.42006 Ukr. Math. J. 32, 367-374 (1981). MSC: 42A10 41A25 41A50 41A63 PDFBibTeX XMLCite \textit{A. I. Stepanets}, Ukr. Math. J. 32, 367--374 (1981; Zbl 0475.42006) Full Text: DOI
Holland, A. S. B. A survey of degree of approximation of continuous functions. (English) Zbl 0475.42005 SIAM Rev. 23, 344-379 (1981). MSC: 42A10 41A50 41A25 41A10 PDFBibTeX XMLCite \textit{A. S. B. Holland}, SIAM Rev. 23, 344--379 (1981; Zbl 0475.42005) Full Text: DOI
Qureshi, K. On the degree of approximation of functions belonging to the Lipschitz class by means of a conjugate series. (English) Zbl 0475.42004 Indian J. Pure Appl. Math. 12, 1120-1123 (1981). MSC: 42A10 40G05 41A25 42A50 PDFBibTeX XMLCite \textit{K. Qureshi}, Indian J. Pure Appl. Math. 12, 1120--1123 (1981; Zbl 0475.42004)
Bloom, Walter R.; Elliott, David The modulus of continuity of the remainder in the approximation of Lipschitz functions. (English) Zbl 0475.41033 J. Approximation Theory 31, 59-66 (1981). MSC: 41A65 41A17 41A25 26A15 PDFBibTeX XMLCite \textit{W. R. Bloom} and \textit{D. Elliott}, J. Approx. Theory 31, 59--66 (1981; Zbl 0475.41033) Full Text: DOI
Romanov, V. S. Approximation of weakly Chebyshev systems by Chebyschev ones. (Russian) Zbl 0475.41032 Vestn. Leningr. Univ. 1981, No. 7, Mat. Mekh. Astron. 1981, No. 2, 117-119 (1981). MSC: 41A65 41A50 41A25 PDFBibTeX XMLCite \textit{V. S. Romanov}, Vestn. Leningr. Univ., Mat. Mekh. Astron. 1981, No. 2, 117--119 (1981; Zbl 0475.41032)
Smith, H. V. Global error bounds for Gauss-Gegenbauer quadrature. (English) Zbl 0475.41031 BIT 21, 481-490 (1981). MSC: 41A55 65D32 41A25 65G99 65D20 PDFBibTeX XMLCite \textit{H. V. Smith}, BIT 21, 481--490 (1981; Zbl 0475.41031) Full Text: DOI
Gelfgren, J. K. Multipoint Padé approximants converging to functions of Stieltjes’ type. (English) Zbl 0475.41019 Pade approximation and its applications, Proc. Conf., Amsterdam 1980, Lect. Notes Math. 888, 197-207 (1981). MSC: 41A21 41A25 41A05 30B70 30D50 PDFBibTeX XML
Yudin, V. A. Multidimensional Jackson theorem in \(L_ 2\). (English. Russian original) Zbl 0475.41013 Math. Notes 29, 158-162 (1981); translation from Mat. Zametki 29, 309-315 (1981). MSC: 41A17 41A25 41A50 PDFBibTeX XMLCite \textit{V. A. Yudin}, Math. Notes 29, 158--162 (1981; Zbl 0475.41013); translation from Mat. Zametki 29, 309--315 (1981) Full Text: DOI
Habib, Anwar On the degree of approximation of functions by certain new Bernstein type polynomials. (English) Zbl 0475.41009 Indian J. Pure Appl. Math. 12, 882-888 (1981). MSC: 41A10 41A25 PDFBibTeX XMLCite \textit{A. Habib}, Indian J. Pure Appl. Math. 12, 882--888 (1981; Zbl 0475.41009)
Boyd, John P. The rate of convergence of Chebyshev polynomials for functions which have asymptotic power series about one endpoint. (English) Zbl 0475.41007 Math. Comput. 37, 189-195 (1981). MSC: 41A10 41A25 42C15 33C45 30B10 PDFBibTeX XMLCite \textit{J. P. Boyd}, Math. Comput. 37, 189--195 (1981; Zbl 0475.41007) Full Text: DOI
Volokhin, V. A. Approximation of functions representable by integrals with a singularity on a sphere. (Russian) Zbl 0475.41005 Izv. Vyssh. Uchebn. Zaved., Mat. 1981, No. 4(227), 73-76 (1981). MSC: 41A10 42A50 41A25 PDFBibTeX XMLCite \textit{V. A. Volokhin}, Izv. Vyssh. Uchebn. Zaved., Mat. 1981, No. 4(227), 73--76 (1981; Zbl 0475.41005)
Malozemova, L. K. On the polynomials of A. O. Gel’fand. (Russian) Zbl 0475.41004 Vestn. Leningr. Univ. 1981, No. 7, Mat. Mekh. Astron. 1981, No. 2, 110-113 (1981). MSC: 41A10 41A25 PDFBibTeX XMLCite \textit{L. K. Malozemova}, Vestn. Leningr. Univ., Mat. Mekh. Astron. 1981, No. 2, 110--113 (1981; Zbl 0475.41004)
Senatov, V. V. Some lower estimates for the rate of convergence in the central limit theorem in a Hilbert space. (English. Russian original) Zbl 0474.60007 Sov. Math., Dokl. 23, 188-192 (1981); translation from Dokl. Akad. Nauk SSSR 256, 1318-1322 (1981). MSC: 60B12 60F05 41A25 60G50 PDFBibTeX XMLCite \textit{V. V. Senatov}, Sov. Math., Dokl. 23, 188--192 (1981; Zbl 0474.60007); translation from Dokl. Akad. Nauk SSSR 256, 1318--1322 (1981)
Bloom, Walter R. Approximation theory on the compact solenoid. (English) Zbl 0474.43007 Functional analysis and approximation, Proc. Conf., Oberwolfach 1980, ISNM 60, 167-174 (1981). MSC: 43A70 43A50 41A25 43A15 43A22 PDFBibTeX XML