'Politehnica'' University of Bucharest. Scientific Bulletin. Series A. Applied Mathematics and Physics (Politehn. Univ. Bucharest Sci. Bull. Ser. A Appl. Math. Phys.) (20220101), 84, no.~2, 13-22. ISSN: 1223-7027 (print).eISSN: 2286-3672.
Subject
47 Operator theory -- 47H Nonlinear operators and their properties 47H09 Contraction-type mappings, nonexpansive mappings, $A$-proper mappings, etc.
49 Calculus of variations and optimal control; optimization -- 49J Existence theories 49J40 Variational methods including variational inequalities