Geodesic
On connection of $m$-term and best approximations of some classes of sequences in the spaces $l_p$
Vestnik Moskovskogo universiteta. Matematika, mehanika, no. 1 (2020), pp. 28-36 Cet article a éte moissonné depuis la source Math-Net.Ru

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Relations between the best $m$-term and best approximations in the spaces $l_p$ are studied for complex-valued sequences whose absolute values satisfy monotonicity-type conditions. 
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N. L. Kudryavtsev. On connection of $m$-term and best approximations of some classes of sequences in the spaces $l_p$. Vestnik Moskovskogo universiteta. Matematika, mehanika, no. 1 (2020), pp. 28-36. http://geodesic.mathdoc.fr/item/VMUMM_2020_1_a3/

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[5] Kudryavtsev N. L., “On connections between the $m$-term and best approximations of some classes of sequences in the spaces $l_p$”, Funktsionalnye prostranstva. Differentsialnye operatory. Problemy matematicheskogo obrazovaniya, Tez. dokl. 5-i Mezhdunar. konf., posvyaschennoi 95-letiyu chl.-korr. RAN, akad. Evrop. akad. nauk L. D. Kudryavtseva (Moskva, RUDN, 26–29 noyabrya 2018 g.), Izd-vo RUDN, M., 2018, 31–32