Geodesic
A criterion for the approximation of a semicontinuous functional by Lipschitz functionals
Dalʹnevostočnyj matematičeskij žurnal, Tome 22 (2022) no. 1, pp. 84-90 
V. Ya. Prudnikov; A. G. Podgaev. A criterion for the approximation of a semicontinuous functional by Lipschitz functionals. Dalʹnevostočnyj matematičeskij žurnal, Tome 22 (2022) no. 1, pp. 84-90. http://geodesic.mathdoc.fr/item/DVMG_2022_22_1_a7/
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Voir la notice de l'article provenant de la source Math-Net.Ru

It is proved in [1, 2] that a functional semi-continuous from below and bounded from below in the metric space X is represented as the limit of a non-decreasing family of Lipschitz functionals. In the lemma from [3], a sufficient condition for such a representation is given for a function semi-continuous from below with respect to one of the variables in a finite-dimensional space. This paper contains a criterion for approximation of a semi-continuous functional from below in a metric space by Lipschitz functionals.

[1] F. Khausdorf, Teoriya mnozhestv, Ob'edinen. nauchn.-tekhn. izd-vo NKTP SSSR, Gl. red. tekhn.-teoret. lit., M.-L., 1937

[2] V. V. Gorokhovik, “O predstavlenii polunepreryvnykh sverkhu funktsii, opredelennykh na beskonechnomernykh normirovannykh prostranstvakh, v vide nizhnikh ogibayuschikh semeistv vypuklykh funktsii”, Tr. IMM Ur.O RAN., 23:1 (2017), 88–102 | MR

[3] V. Ya. Prudnikov, “Neravenstvo Iensena v idealnom prostranstve”, Sib. zhurn. industr. matem., 10:2 (2007), 119–127 | Zbl

[4] Zh. -P. Oben, Nelineinyi analiz i ego ekonomicheskie prilozheniya, Mir, Moskva, 1988 | MR