Kushpel’, A. K. Estimates of the widths of classes of analytic functions. (English. Russian original) Zbl 0732.41026 Ukr. Math. J. 41, No. 4, 493-496 (1989); translation from Ukr. Mat. Zh. 41, No. 4, 567-570 (1989). Reviewer: J.Rákosník (Praha) MSC: 41A46 PDF BibTeX XML Cite \textit{A. K. Kushpel'}, Ukr. Math. J. 41, No. 4, 493--496 (1989; Zbl 0732.41026); translation from Ukr. Mat. Zh. 41, No. 4, 567--570 (1989) Full Text: DOI OpenURL
Andrievskij, V. V. Certain classes of harmonic functions with singularities on a quasiconformal arc. (English. Russian original) Zbl 0732.31003 Ukr. Math. J. 41, No. 4, 406-409 (1989); translation from Ukr. Mat. Zh. 41, No. 4, 465-468 (1989). MSC: 31A15 31C05 30E10 30C62 PDF BibTeX XML Cite \textit{V. V. Andrievskij}, Ukr. Math. J. 41, No. 4, 406--409 (1989; Zbl 0732.31003); translation from Ukr. Mat. Zh. 41, No. 4, 465--468 (1989) Full Text: DOI OpenURL
Shevchuk, I. A. Properties of the Dzyadyk polynomial kernels on a closed segment. (English. Russian original) Zbl 0731.41008 Ukr. Math. J. 41, No. 4, 457-461 (1989); translation from Ukr. Mat. Zh. 41, No. 4, 524-530 (1989). Reviewer: Y.A.Brudnyi (Haifa) MSC: 41A10 PDF BibTeX XML Cite \textit{I. A. Shevchuk}, Ukr. Math. J. 41, No. 4, 457--461 (1989; Zbl 0731.41008); translation from Ukr. Mat. Zh. 41, No. 4, 524--530 (1989) Full Text: DOI OpenURL
Zaderej, P. V. Mean convergence of Fourier series. (English. Russian original) Zbl 0727.42004 Ukr. Math. J. 41, No. 4, 482-487 (1989); translation from Ukr. Mat. Zh. 41, No. 4, 553-559 (1989). Reviewer: I.Vrkoč (Praha) MSC: 42A20 PDF BibTeX XML Cite \textit{P. V. Zaderej}, Ukr. Math. J. 41, No. 4, 482--487 (1989; Zbl 0727.42004); translation from Ukr. Mat. Zh. 41, No. 4, 553--559 (1989) Full Text: DOI OpenURL
Konovalov, V. N. Uniform approximation by algebraic polynomials and continuation of functions of many real variables. (English. Russian original) Zbl 0721.41013 Ukr. Math. J. 41, No. 4, 423-428 (1989); translation from Ukr. Mat. Zh. 41, No. 4, 485-492 (1989). MSC: 41A10 41A63 PDF BibTeX XML Cite \textit{V. N. Konovalov}, Ukr. Math. J. 41, No. 4, 423--428 (1989; Zbl 0721.41013); translation from Ukr. Mat. Zh. 41, No. 4, 485--492 (1989) Full Text: DOI OpenURL
Temlyakov, V. N. Approximation of functions of several variables by trigonometric polynomials with harmonics from hyperbolic crosses. (English. Russian original) Zbl 0714.42002 Ukr. Math. J. 41, No. 4, 451-456 (1989); translation from Ukr. Mat. Zh. 41, No. 4, 518-524 (1989). MSC: 42A10 42B99 PDF BibTeX XML Cite \textit{V. N. Temlyakov}, Ukr. Math. J. 41, No. 4, 451--456 (1989; Zbl 0714.42002); translation from Ukr. Mat. Zh. 41, No. 4, 518--524 (1989) Full Text: DOI OpenURL
Bakan, A. G. Nonempty classes of normal pairs of cones of transfinite order. (English. Russian original) Zbl 0709.46003 Ukr. Math. J. 41, No. 4, 462-466 (1989); translation from Ukr. Mat. Zh. 41, No. 4, 531-536 (1989). MSC: 46A40 PDF BibTeX XML Cite \textit{A. G. Bakan}, Ukr. Math. J. 41, No. 4, 462--466 (1989; Zbl 0709.46003); translation from Ukr. Mat. Zh. 41, No. 4, 531--536 (1989) Full Text: DOI OpenURL
Efimov, A. V.; Pospelov, A. S. Properties of integral transforms with \(\Lambda\)-multiplicative kernels. (English. Russian original) Zbl 0704.42012 Ukr. Math. J. 41, No. 4, 418-422 (1989); translation from Ukr. Mat. Zh. 41, No. 4, 479-484 (1989). Reviewer: F.Moricz MSC: 42A38 PDF BibTeX XML Cite \textit{A. V. Efimov} and \textit{A. S. Pospelov}, Ukr. Math. J. 41, No. 4, 418--422 (1989; Zbl 0704.42012); translation from Ukr. Mat. Zh. 41, No. 4, 479--484 (1989) Full Text: DOI OpenURL
Davydov, N. A.; Vlasenko, V. F. One class of bounded inefficient and completely inefficient normal conservative positive matrices. (English. Russian original) Zbl 0702.40008 Ukr. Math. J. 41, No. 4, 479-482 (1989); translation from Ukr. Mat. Zh. 41, No. 4, 550-553 (1989). Reviewer: T.Šalát MSC: 40C05 PDF BibTeX XML Cite \textit{N. A. Davydov} and \textit{V. F. Vlasenko}, Ukr. Math. J. 41, No. 4, 479--482 (1989; Zbl 0702.40008); translation from Ukr. Mat. Zh. 41, No. 4, 550--553 (1989) Full Text: DOI OpenURL
Belyj, V. I.; Golub, A. P.; Shevchuk, I. A. Dzyadyk’s research on the theory of approximation of functions of a complex variable. (English. Russian original) Zbl 0701.30038 Ukr. Math. J. 41, No. 4, 384-395 (1989); translation from Ukr. Mat. Zh. 41, No. 4, 441-454 (1989). MSC: 30E10 30-03 30-01 41-03 PDF BibTeX XML Cite \textit{V. I. Belyj} et al., Ukr. Math. J. 41, No. 4, 384--395 (1989; Zbl 0701.30038); translation from Ukr. Mat. Zh. 41, No. 4, 441--454 (1989) Full Text: DOI OpenURL
Karpenko, S. F. Approximate solution of the Lyapunov-Lichtenstein equation with the aid of the approximation-iteration method. (English. Russian original) Zbl 0694.65069 Ukr. Math. J. 41, No. 4, 487-492 (1989); translation from Ukr. Mat. Zh. 41, No. 4, 559-565 (1989). MSC: 65R20 45H05 45B05 PDF BibTeX XML Cite \textit{S. F. Karpenko}, Ukr. Math. J. 41, No. 4, 487--492 (1989; Zbl 0694.65069); translation from Ukr. Mat. Zh. 41, No. 4, 559--565 (1989) Full Text: DOI OpenURL
Bilenko, V. I.; Konovalov, V. N.; Lukovskij, I. A.; Luchka, A. Yu.; Pukhov, G. E.; Ronto, N. I. Dzyadyk’s approximation methods for the solution of differential and integral equations. (English. Russian original) Zbl 0694.65067 Ukr. Math. J. 41, No. 4, 395-405 (1989); translation from Ukr. Mat. Zh. 41, No. 4, 454-465 (1989). MSC: 65R20 65-02 65L05 45B05 34A34 PDF BibTeX XML Cite \textit{V. I. Bilenko} et al., Ukr. Math. J. 41, No. 4, 395--405 (1989; Zbl 0694.65067); translation from Ukr. Mat. Zh. 41, No. 4, 454--465 (1989) Full Text: DOI OpenURL
Volkov, E. A. Approximately conformal mapping of the exterior of a parabola with a hole onto an annulus. (English. Russian original) Zbl 0693.30007 Ukr. Math. J. 41, No. 4, 415-418 (1989); translation from Ukr. Mat. Zh. 41, No. 4, 475-479 (1989). MSC: 30C30 PDF BibTeX XML Cite \textit{E. A. Volkov}, Ukr. Math. J. 41, No. 4, 415--418 (1989; Zbl 0693.30007); translation from Ukr. Mat. Zh. 41, No. 4, 475--479 (1989) Full Text: DOI OpenURL
Bilenko, V. I. Error of the alpha-method for solving Volterra integral equations with polynomial nonlinearities. (English. Russian original) Zbl 0692.65075 Ukr. Math. J. 41, No. 4, 467-472 (1989); translation from Ukr. Mat. Zh. 41, No. 4, 537-543 (1989). MSC: 65R20 45G10 PDF BibTeX XML Cite \textit{V. I. Bilenko}, Ukr. Math. J. 41, No. 4, 467--472 (1989; Zbl 0692.65075); translation from Ukr. Mat. Zh. 41, No. 4, 537--543 (1989) Full Text: DOI OpenURL
Kovtunets, V. V. An application of polynomials with smallest deviation from zero with connections to the conformal mapping problem. (English. Russian original) Zbl 0692.30006 Ukr. Math. J. 41, No. 4, 492-493 (1989); translation from Ukr. Mat. Zh. 41, No. 4, 566-567 (1989). MSC: 30C20 30E10 PDF BibTeX XML Cite \textit{V. V. Kovtunets}, Ukr. Math. J. 41, No. 4, 492--493 (1989; Zbl 0692.30006); translation from Ukr. Mat. Zh. 41, No. 4, 566--567 (1989) Full Text: DOI OpenURL
Belyj, V. I. Moduli of continuity of exterior and interior conformal mappings of the unit disc. (English. Russian original) Zbl 0692.30005 Ukr. Math. J. 41, No. 4, 409-414 (1989); translation from Ukr. Mat. Zh. 41, No. 4, 469-475 (1989). MSC: 30C20 PDF BibTeX XML Cite \textit{V. I. Belyj}, Ukr. Math. J. 41, No. 4, 409--414 (1989; Zbl 0692.30005); translation from Ukr. Mat. Zh. 41, No. 4, 469--475 (1989) Full Text: DOI OpenURL
Mel’nik, Yu. I.; Krutigolova, E. K. Properties of certain special series of exponents with complex indices. (English. Russian original) Zbl 0692.30004 Ukr. Math. J. 41, No. 4, 496-499 (1989); translation from Ukr. Mat. Zh. 41, No. 4, 571-573 (1989). MSC: 30B50 PDF BibTeX XML Cite \textit{Yu. I. Mel'nik} and \textit{E. K. Krutigolova}, Ukr. Math. J. 41, No. 4, 496--499 (1989; Zbl 0692.30004); translation from Ukr. Mat. Zh. 41, No. 4, 571--573 (1989) Full Text: DOI OpenURL
Grona, V. L. Uniform approximation by spherical Fourier sums on classes of functions defined by polyharmonic operators. (English. Russian original) Zbl 0755.42007 Ukr. Math. J. 41, No. 4, 473-479 (1989); translation from Ukr. Mat. Zh. 41, No. 4, 543-550 (1989). Reviewer: R.Gajewski (Poznań) MSC: 42B05 42B08 PDF BibTeX XML Cite \textit{V. L. Grona}, Ukr. Math. J. 41, No. 4, 473--479 (1989; Zbl 0755.42007); translation from Ukr. Mat. Zh. 41, No. 4, 543--550 (1989) Full Text: DOI OpenURL
Telyakovskij, S. A. Approximation of functions of high smoothness by Fourier sums. (English. Russian original) Zbl 0755.42004 Ukr. Math. J. 41, No. 4, 444-451 (1989); translation from Ukr. Mat. Zh. 41, No. 4, 510-518 (1989). Reviewer: R.Gajewski (Poznań) MSC: 42A10 PDF BibTeX XML Cite \textit{S. A. Telyakovskij}, Ukr. Math. J. 41, No. 4, 444--451 (1989; Zbl 0755.42004); translation from Ukr. Mat. Zh. 41, No. 4, 510--518 (1989) Full Text: DOI OpenURL
Stepanets, A. I. Lebesgue’s inequality on classes of \((\psi{},\beta{})\)-differentiable functions. (English. Russian original) Zbl 0738.42008 Ukr. Math. J. 41, No. 4, 435-443 (1989); translation from Ukr. Mat. Zh. 41, No. 4, 499-510 (1989). Reviewer: J.Fuka (Praha) MSC: 42A10 PDF BibTeX XML Cite \textit{A. I. Stepanets}, Ukr. Math. J. 41, No. 4, 435--443 (1989; Zbl 0738.42008); translation from Ukr. Mat. Zh. 41, No. 4, 499--510 (1989) Full Text: DOI OpenURL
Kornejchuk, N. P. Approximation and optimal coding of smooth plane curves. (English. Russian original) Zbl 0797.41017 Ukr. Math. J. 41, No. 4, 429-435 (1989); translation from Ukr. Mat. Zh. 41, No. 4, 492-499 (1989). MSC: 41A30 PDF BibTeX XML Cite \textit{N. P. Kornejchuk}, Ukr. Math. J. 41, No. 4, 429--435 (1989; Zbl 0797.41017); translation from Ukr. Mat. Zh. 41, No. 4, 492--499 (1989) Full Text: DOI OpenURL
Stepanets, A. I. Dzyadyk’s research on the theory of approximation of periodic functions. (English. Russian original) Zbl 0755.01044 Ukr. Math. J. 41, No. 4, 379-383 (1989); translation from Ukr. Mat. Zh. 41, No. 4, 436-441 (1989). Reviewer: M.A.Jimenez (Habana) MSC: 01A70 42-03 PDF BibTeX XML Cite \textit{A. I. Stepanets}, Ukr. Math. J. 41, No. 4, 379--383 (1989; Zbl 0755.01044); translation from Ukr. Mat. Zh. 41, No. 4, 436--441 (1989) Full Text: DOI OpenURL