A saddle point theorem for non-smooth functionals and problems at resonance
Referera så här
Niculescu, C. P., & Radulescu, V. (1996). A saddle point theorem for non-smooth functionals and problems at resonance. Annales Fennici Mathematici, 21(1), 117–131. Hämtad från https://afm.journal.fi/article/view/134857
Copyright (c) 1996 The Finnish Mathematical Society
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