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Found 164 Documents (Results 1–100)

Best constant inequalities involving the analytic and co-analytic projection. (English) Zbl 1193.42064

Ball, Joseph A. (ed.) et al., Topics in operator theory. Volume 1: Operators, matrices and analytic functions. Proceedings of the 19th international workshop on operator theory and applications (IWOTA), College of William and Mary, Williamsburg, VA, USA, July 22–26, 2008. A tribute to Israel Gohberg on the occasion of his 80th birthday. Basel: Birkhäuser (ISBN 978-3-0346-0157-3/hbk; 978-3-0346-0163-4/set; 978-3-0346-0158-0/ebook). Operator Theory: Advances and Applications 202, 285-295 (2010).

Potential theoretic tools in polynomial and rational approximation. (English) Zbl 1146.41001

Fournier, Jean-Daniel (ed.) et al., Harmonic analysis and rational approximation. Their rôles in signals, control and dynamical systems. Berlin: Springer (ISBN 3-540-30922-5/pbk). Lecture Notes in Control and Information Sciences 327, 71-94 (2006).

The Hilbert transform, rearrangements, and logarithmic determinants. (English) Zbl 1018.42003

Żelazko, Wiesław (ed.), Fourier analysis and related topics. Papers of the international symposium dedicated to the memory of A. Rajchman, A. Zygmund and J. Marcinkiewicz, Bȩdlewo, Poland, October 15-21, 2000. Warsaw: Polish Academy of Sciences, Institute of Mathematics, Banach Cent. Publ. 56, 95-105 (2002).
MSC:  42A50 31A05

On estimation of polynomials in terms of logarithmic sums over powers of integers. (English) Zbl 1028.30020

Proceedings of the fourth international conference on functional analysis and approximation theory, Acquafredda di Maratea (Potenza), Italy, September 22-28, 2000. Vol. II. Palermo: Circolo Matemàtico di Palermo, Suppl. Rend. Circ. Mat. Palermo, II. Ser. 68(2), 739-748 (2002).
Reviewer: Y.Avci (İstanbul)
MSC:  30D15 31A05 42A65

Best constants in Zygmund’s inequality for conjugate functions. (English) Zbl 1051.42007

Heinonen, J. (ed.) et al., Papers on analysis: a volume dedicated to Olli Martio on the occasion of his 60th birthday. Jyväskylä: Univ. Jyväskylä, Institut für Mathematik und Statistik (ISBN 951-39-1120-9/pbk). Ber., Univ. Jyväskylä 83, 73-80 (2001).
MSC:  42A50 30D55 31A05

On approximation of classes of \((\psi,\beta)\)-differentiable functions by biharmonic Poisson operators. (Ukrainian. English summary) Zbl 1030.31003

Kovtunets, V. V. (ed.), Approximation theory and its applications. Proceedings of the international conference dedicated to the memory of Vladislav Kirillovich Dzyadyk held in Kiev, Ukraine, May 27-31, 1999. Kyïv: Instytut Matematyky NAN Ukraïny. Pr. Inst. Mat. Nats. Akad. Nauk Ukr., Mat. Zastos. 31, 227-236 (2000).
MSC:  31A30 41A35 42A85

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