Sikkema, P. C. Voronovskaya type formulae for convolution operators approximating with great speed. (English) Zbl 0547.41017 Approximation theory III, Proc. Conf. Hon. G. G. Lorentz, Austin/Tex. 1980, 837-840 (1980). Reviewer: S.M.Shah MSC: 41A35 41A25 PDFBibTeX XML
Schurer, F.; Steutel, F. W. Exact degrees of approximation for two-dimensional Bernstein operators on \(C^ 1\). (English) Zbl 0545.41026 Approximation theory III, Proc. Conf. Hon. G. G. Lorentz, Austin/Tex. 1980, 823-828 (1980). Reviewer: M.Nashed MSC: 41A36 41A25 41A35 PDFBibTeX XML
Chalmers, B. L.; Metcalf, F. T. Multiplicative variations lead to the variational equations for minimal projections. (English) Zbl 0507.41025 Approximation theory III, Proc. Conf. Hon. G. G. Lorentz, Austin/Tex. 1980, 285-291 (1980). MSC: 41A65 41A35 PDFBibTeX XML
Wehrens, Matthias Legendre-Transformationsmethoden und Approximation von Funktionen auf der Einheitskugel im \(R^ 3\). (German) Zbl 0503.41016 Mathematisch-Naturwissenschaftliche Fakultät der Rheinisch-Westfälischen Technischen Hochschule Aachen. 64 S. (1980). MSC: 41A50 41A17 41A25 26B05 41A30 41A35 42B20 42C05 44A05 44A35 PDFBibTeX XML
Schetzen, Martin The Volterra and Wiener theories of nonlinear systems. (English) Zbl 0501.93002 A Wiley-Interscience Publication. New York - Chichester - Brisbane: John Wiley & Sons. XVI, 531 p. $ 28.50 (1980). MSC: 93-01 93C10 93E12 93B30 41A35 45D05 60J65 93E10 PDFBibTeX XML
Shekhtman, Boris Some remarks on approximation in \(C(\Omega)\). (English) Zbl 0501.41015 Approximation theory III, Proc. Conf. Hon. G. G. Lorentz, Austin/Tex. 1980, 829-836 (1980). MSC: 41A35 41A63 41A05 41A65 PDFBibTeX XML
Schempp, Walter Approximations in the Hardy space \(H^ 1(\)D) with respect to the norm topology. (English) Zbl 0489.41020 Quantitative approximation, Proc. int. Symp., Bonn 1979, 291-300 (1980). MSC: 41A35 41A65 PDFBibTeX XML
Light, W. A. Non-linear families of projections on C[-1, 1]. (English) Zbl 0488.41019 J. Approximation Theory 30, 197-202 (1980). MSC: 41A35 41A65 42C10 PDFBibTeX XMLCite \textit{W. A. Light}, J. Approx. Theory 30, 197--202 (1980; Zbl 0488.41019) Full Text: DOI
Musielak, Julian A theorem on weighted approximation of positive functions. (English) Zbl 0472.41019 Funct. Approximatio, Comment. Math. 8, 43-47 (1980). MSC: 41A30 41A35 42B20 PDFBibTeX XMLCite \textit{J. Musielak}, Funct. Approximatio, Comment. Math. 8, 43--47 (1980; Zbl 0472.41019)
Shi, Xianliang On the approximation of continuous functions by de la Valle Poussin mean. (Chinese) Zbl 0469.42001 Acta Math. Sin. 23, 823-835 (1980). MSC: 42A10 42A50 41A35 PDFBibTeX XMLCite \textit{X. Shi}, Acta Math. Sin. 23, 823--835 (1980; Zbl 0469.42001)
Merlina, N. I. On the question of approximating continuous functions by singular integrals. (English) Zbl 0464.42008 Sov. Math. 24, No. 9, 106-109 (1980). MSC: 42A50 41A30 41A35 PDFBibTeX XMLCite \textit{N. I. Merlina}, Sov. Math. 24, No. 9, 106--109 (1980; Zbl 0464.42008)
Mann, Reinhold Modelle zur Identifikation von nichtlinearen zeitinvarianten Systemen. (German) Zbl 0463.93032 Fachbereich Physik der Johannes Gutenberg-Universität in Mainz. 123 S. (1980). MSC: 93B30 93C10 93A99 93C15 41A35 PDFBibTeX XML
De Figueiredo, Rui J. P.; Dwyer, Thomas A. W. III A best approximation framework and implementation for simulation of large-scale nonlinear systems. (English) Zbl 0459.93008 IEEE Trans. Circuits Syst. 27, 1005-1014 (1980). MSC: 93A15 93C10 93C99 93C25 41A35 PDFBibTeX XMLCite \textit{R. J. P. De Figueiredo} and \textit{T. A. W. Dwyer III}, IEEE Trans. Circuits Syst. 27, 1005--1014 (1980; Zbl 0459.93008) Full Text: DOI
Orochko, Yu. B. Smooth approximation of selfadjoint differential operators of divergence form with bounded measurable coefficients. (English) Zbl 0459.47044 Math. USSR, Sb. 37, 389-401 (1980). MSC: 47F05 35R05 35J15 35A35 35P05 35J10 47A60 47B25 41A35 47A10 PDFBibTeX XMLCite \textit{Yu. B. Orochko}, Math. USSR, Sb. 37, 389--401 (1980; Zbl 0459.47044) Full Text: DOI
Wafi, A.; Khan, A.; Umar, S. A note on the order of approximation of Gauss-Weierstrass singular integral. (English) Zbl 0459.41011 Soochow J. Math. 6, 145-147 (1980). MSC: 41A25 41A35 PDFBibTeX XMLCite \textit{A. Wafi} et al., Soochow J. Math. 6, 145--147 (1980; Zbl 0459.41011)
Fliess, Michel Une approche algébrique du développement fonctionnel des solutions d’équations différentielles non linéaires forcees. (French) Zbl 0458.93029 Astérisque 75-76, 95-103 (1980). MSC: 93C10 93C15 41A35 PDFBibTeX XMLCite \textit{M. Fliess}, Astérisque 75--76, 95--103 (1980; Zbl 0458.93029)
Ewen, Edward J.; Weiner, Donald D. Identification of weakly nonlinear systems using input and output measurements. (English) Zbl 0458.93022 IEEE Trans. Circuits Syst. 27, 1255-1261 (1980). MSC: 93B30 93C10 41A35 PDFBibTeX XMLCite \textit{E. J. Ewen} and \textit{D. D. Weiner}, IEEE Trans. Circuits Syst. 27, 1255--1261 (1980; Zbl 0458.93022) Full Text: DOI
Crouch, Peter E. Realizations of a single Volterra kernel. (English) Zbl 0458.93016 Astérisque 75-76, 77-85 (1980). MSC: 93B15 93C10 41A35 PDFBibTeX XMLCite \textit{P. E. Crouch}, Astérisque 75--76, 77--85 (1980; Zbl 0458.93016)
Bleimann, G.; Stark, E. L. Kernels of finite oscillations and convolution integrals. (English) Zbl 0457.42002 Acta Math. Acad. Sci. Hung. 35, 419-429 (1980). MSC: 42A10 41A40 41A44 41A25 41A35 PDFBibTeX XMLCite \textit{G. Bleimann} and \textit{E. L. Stark}, Acta Math. Acad. Sci. Hung. 35, 419--429 (1980; Zbl 0457.42002) Full Text: DOI
Sendov, Bl. Kh. Konvergenz der Ableitungen linearer Operatoren. (Russian) Zbl 0456.47016 Constructive function theory, Proc. int. Conf., Blagoevgrad 1977, 131-143 (1980). MSC: 47A55 41A65 41A35 47B60 PDFBibTeX XML
Arestov, V. V. An approximation of operators of convolution type by means of linear bounded operators. (Russian) Zbl 0456.47015 Tr. Mat. Inst. Steklova 145, 3-19 (1980). MSC: 47A55 41A35 41A44 41A65 PDFBibTeX XMLCite \textit{V. V. Arestov}, Tr. Mat. Inst. Steklova 145, 3--19 (1980; Zbl 0456.47015)
Pietsch, Albrecht Factorization theorems for some scales of operator ideals. (English) Zbl 0455.47032 Math. Nachr. 97, 15-19 (1980). MSC: 47L10 41A46 47B10 41A35 46M35 PDFBibTeX XMLCite \textit{A. Pietsch}, Math. Nachr. 97, 15--19 (1980; Zbl 0455.47032) Full Text: DOI
Balazs, Catherine Approximation in \(L_ 2-\)space by interpolatory type operators. (English) Zbl 0453.41017 Acta Math. Acad. Sci. Hung. 35, 403-408 (1980). MSC: 41A35 41A05 41A10 41A65 PDFBibTeX XMLCite \textit{C. Balazs}, Acta Math. Acad. Sci. Hung. 35, 403--408 (1980; Zbl 0453.41017) Full Text: DOI
Shaw, Sen-Yen Approximation of unbounded functions and applications to representations of semigroups. (English) Zbl 0452.41020 J. Approximation Theory 28, 238-259 (1980). MSC: 41A36 41A35 41A63 20M30 PDFBibTeX XMLCite \textit{S.-Y. Shaw}, J. Approx. Theory 28, 238--259 (1980; Zbl 0452.41020) Full Text: DOI
Somorjai, G. On discrete linear operators in the function space A. (English) Zbl 0452.41015 Constructive function theory, Proc. int. Conf., Blagoevgrad 1977, 489-496 (1980). MSC: 41A35 41A45 PDFBibTeX XML
Sikkema, P. C. Approximation with bell-shaped functions. (English) Zbl 0452.41013 Constructive function theory, Proc. int. Conf., Blagoevgrad 1977, 485-488 (1980). MSC: 41A30 41A35 PDFBibTeX XML
Joo, I. Remarks to a theorem of B. S. Kasin on convergence systems. (English) Zbl 0451.40001 Constructive function theory, Proc. int. Conf., Blagoevgrad 1977, 345-351 (1980). MSC: 40A05 40J05 41A35 PDFBibTeX XML
Timmermans, C. A. On generalized convolution operators, iteration and semi-groups. (English) Zbl 0446.44005 Constructive function Theory, Proc. int. Conf., Blagoevgrad 1977, 511-516 (1980). MSC: 44A35 44A40 47D03 41A35 PDFBibTeX XML
Subbotin, Yu. N. Extremal problems for the theory of approximation of functions with an incomplete information. (Russian) Zbl 0439.41013 Tr. Mat. Inst. Steklova 145, 152-168 (1980). MSC: 41A46 41A50 41A35 41A65 PDFBibTeX XMLCite \textit{Yu. N. Subbotin}, Tr. Mat. Inst. Steklova 145, 152--168 (1980; Zbl 0439.41013)
Tomic, Milosh Die beste Approximation einer Funktion und die Approximation vermittels singulärer Integrale. (Russian) Zbl 0437.41018 Glas. Mat., III. Ser. 15(35), 71-78 (1980). MSC: 41A35 41A30 41A50 PDFBibTeX XMLCite \textit{M. Tomic}, Glas. Mat., III. Ser. 15(35), 71--78 (1980; Zbl 0437.41018)
Axler, Sheldon; Jewell, Nicholas; Shields, Allen The essential norm of an operator and its adjoint. (English) Zbl 0434.41016 Trans. Am. Math. Soc. 261, 159-167 (1980). MSC: 41A35 41A65 PDFBibTeX XMLCite \textit{S. Axler} et al., Trans. Am. Math. Soc. 261, 159--167 (1980; Zbl 0434.41016) Full Text: DOI
Joni, S. A. Multivariate exponential operators. (English) Zbl 0427.41012 Stud. Appl. Math. 62, 175-182 (1980). MSC: 41A35 41A63 PDFBibTeX XMLCite \textit{S. A. Joni}, Stud. Appl. Math. 62, 175--182 (1980; Zbl 0427.41012) Full Text: DOI
Kurc, W. On some examples of linear positive operators, in the space of continuous functions, related to the classical orthogonal polynomials. (English) Zbl 0406.41017 Constructive function theory, Proc. int. Conf., Blagoevgrad 1977 (to appear). MSC: 41A35 42C05 PDFBibTeX XML
Khan, R. A. Some probabilistic methods in the theory of approximation operators. (English) Zbl 0404.41012 Acta Math. Acad. Sci. Hung. 35, 193-203 (1980). MSC: 41A35 60F05 PDFBibTeX XMLCite \textit{R. A. Khan}, Acta Math. Acad. Sci. Hung. 35, 193--203 (1980; Zbl 0404.41012) Full Text: DOI
Becker, M.; Nessel, R. J. Inverse results via smoothing. (English) Zbl 0401.41009 Constructive function theory, Proc. int. Conf., Blagoevgrad 1977, 231-243 (1980). MSC: 41A10 41A65 41A50 41A35 PDFBibTeX XML