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A note on commutator estimates for interpolation methods
Author(s) -
Cerdà Joan
Publication year - 2007
Publication title -
mathematische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 50
eISSN - 1522-2616
pISSN - 0025-584X
DOI - 10.1002/mana.200510532
Subject(s) - commutator , mathematics , interpolation (computer graphics) , norm (philosophy) , constant (computer programming) , algebra over a field , pure mathematics , computer science , artificial intelligence , political science , law , programming language , lie conformal algebra , motion (physics)
The aim of this note is to show how all the commutator estimates of two recent papers, by M. Cwikel, N. Kalton, M. Milman, and R. Rochberg and by N. Krugljak and M. Milman, can be considered as special cases of the method of couples of interpolators introduced by M. J. Carro, J. Cerdà and J. Soria, and also to show how the distance between orbits and the “Benson norm” considered by Krugljak and Milman can be extended, respectively, as a distance between the interpolators that appear in the general construction and as a constant that is finite when the interpolators satisfy the necessary cancellation property. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)