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On the converse theorem of approximation in various metrics for nonperiodic functions
Author(s) -
Miloš Tomić
Publication year - 2014
Publication title -
publications de l institut mathematique
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.246
H-Index - 17
eISSN - 1820-7405
pISSN - 0350-1302
DOI - 10.2298/pim1409161t
Subject(s) - converse , converse theorem , mathematics , exponential type , exponential function , smoothness , norm (philosophy) , modulus of continuity , metric (unit) , mathematical analysis , space (punctuation) , metric space , type (biology) , pure mathematics , computer science , geometry , ecology , operations management , political science , law , economics , biology , operating system , automorphic form
The modulus of smoothness in the norm of space Lq of nonperiodic functions of several variables is estimated by best approximations by entire functions of exponential type in the metric of space Lp, 1 ≤ p ≤ q < ∞.

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