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Found 19 Documents (Results 1–19)

On the selection of a subsystem of convergence with logarithmic density from an arbitrary orthogonal system. (English. Russian original) Zbl 0714.42016

Math. USSR, Sb. 64, No. 1, 41-56 (1989); translation from Mat. Sb., Nov. Ser. 136(178), No. 1(5), 41-55 (1988).
MSC:  42C05 46E30
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On the question of the existence of continuous branches of multivalued mappings with nonconvex images in spaces of summable functions. (English. Russian original) Zbl 0711.46025

Math. USSR, Sb. 64, No. 1, 295-303 (1989); translation from Mat. Sb., Nov. Ser. 136(178), No. 2(6), 292-300 (1988).
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Inverse problems of spectral analysis for Sturm-Liouville operators with nonseparated boundary conditions. II. (English. Russian original) Zbl 0702.34016

Math. USSR, Sb. 64, No. 1, 141-160 (1989); translation from Mat. Sb., Nov. Ser. 136(178), No. 1(5), 140-159 (1988).
Reviewer: J.Appell
MSC:  34A55
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Inverse problems of spectral analysis for Sturm-Liouville operators with nonseparated boundary conditions. II. (English. Russian original) Zbl 0697.34026

Math. USSR, Sb. 64, No. 1, 141-160 (1989); translation from Mat. Sb., Nov. Ser. 136(178), No. 1(5), 140-159 (1988).
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Boundary conditions on thin manifolds and the semiboundedness of the three-particle Schrödinger operator with pointwise potential. (English. Russian original) Zbl 0687.35064

Math. USSR, Sb. 64, No. 1, 161-175 (1989); translation from Mat. Sb., Nov. Ser. 136(178), No. 2(6), 163-177 (1988).
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On boundary values of solutions of elliptic equations degenerating on the boundary. (English. Russian original) Zbl 0683.35034

Math. USSR, Sb. 64, No. 1, 243-262 (1989); translation from Mat. Sb., Nov. Ser. 136(178), No. 2(6), 241-259 (1988).
Reviewer: J.Tian
MSC:  35J70 35J67 35D05
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Convergence of Padé approximants of Stieltjes type meromorphic functions and comparative asymptotics for orthogonal polynomials. (English. Russian original) Zbl 0669.30026

Math. USSR, Sb. 64, No. 1, 207-227 (1989); translation from Mat. Sb., Nov. Ser. 136(178), No. 2(6), 206-226 (1988).
MSC:  30E10 42C05
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Extremal properties of orthogonal parallelepipeds and their applications to the geometry of Banach spaces. (English. Russian original) Zbl 0668.52002

Math. USSR, Sb. 64, No. 1, 85-96 (1989); translation from Mat. Sb., Nov. Ser. 136(178), No. 1(5), 85-96 (1988).
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