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On the possibility of strengthening the Lieb-Thirring inequality. (English. Russian original) Zbl 1185.26039

Math. Notes 86, No. 6, 753-766 (2009); translation from Mat. Zametki 86, No. 6, 803-818 (2009).
Answering a problem of B. S. Kaskin pertaining to inequalities of Lieb–Thirring type for orthonormal systems, the author proved two crucial theorems using the standard theory of functions. His inequalities have applications in the theory of partial differential equations, too.

MSC:

26D15 Inequalities for sums, series and integrals
42C15 General harmonic expansions, frames
Full Text: DOI

References:

[1] E. H. Lieb and W. Thirring, ”Inequalities for the moments of the eigenvalues the Schrödinger Hamiltonian and their relation to Sobolev inequalities,” in Studies in Mathematical Physics. Essays in Honor of Valentine Bargmann (Princeton Univ. Press, Princeton, NJ, 1976), pp. 269–303. · Zbl 0342.35044
[2] B. S. Kashin, ”On a class of inequalities for orthonormal systems,” Mat. Zametki 80(2), 204–208 (2006) [Math. Notes 80 (1–2), 199–203 (2006)]. · Zbl 1130.46005 · doi:10.4213/mzm2801
[3] D. S. Barsegyan, ”On inequalities of Lieb-Thirring type,” Mat. Zametki 82(4), 504–514 (2007) [Math. Notes 82 (3–4), 451–460 (2007)]. · Zbl 1144.42007 · doi:10.4213/mzm4018
[4] S. V. Astashkin, ”The Lieb-Thirring inequality for L p-norms,” Mat. Zametki 83(2), 163–169 (2008) [Math. Notes 83 (1–2), 145–151 (2008)]. · doi:10.4213/mzm4415
[5] B. S. Kashin and A. A. Saakyan, Orthogonal Series (Izd. AFTs, Moscow, 1999) [in Russian]. · Zbl 1188.42010
[6] S. M. Nikol’skii, Approximation of Functions of Several Variables and Embedding Theorems (Nauka, Moscow, 1977) [in Russian].
[7] I. P. Natanson, Theory of Functions of a Real Variable (Nauka, Moscow, 1974) [in Russian].
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