Variational methods in nonlinear problems
Séminaire Équations aux dérivées partielles (Polytechnique), (1980-1981), Talk no. 20, 5 p.
@article{SEDP_1980-1981____A22_0,
     author = {Nirenberg, Louis},
     title = {Variational methods in nonlinear problems},
     journal = {S\'eminaire \'Equations aux d\'eriv\'ees partielles (Polytechnique)},
     publisher = {Ecole Polytechnique, Centre de Math\'ematiques},
     year = {1980-1981},
     note = {talk:20},
     zbl = {0477.35002},
     language = {en},
     url = {http://www.numdam.org/item/SEDP_1980-1981____A22_0}
}
Nirenberg, L. Variational methods in nonlinear problems. Séminaire Équations aux dérivées partielles (Polytechnique),  (1980-1981), Talk no. 20, 5 p. http://www.numdam.org/item/SEDP_1980-1981____A22_0/

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