VARIATIONAL-METHODS FOR NON-DIFFERENTIABLE FUNCTIONALS AND THEIR APPLICATIONS TO PARTIAL-DIFFERENTIAL EQUATIONS

[1] ELEMENTARY CRITICAL-POINT THEORY AND PERTURBATIONS OF ELLIPTIC BOUNDARY-VALUE PROBLEMS AT RESONANCE [J]. INDIANA UNIVERSITY MATHEMATICS JOURNAL, 1976, 25 (10) : 933 - 944

[2] LUSTERNIK-SCHNIRELMAN THEORY AND NONLINEAR EIGENVALUE PROBLEMS [J]. MATHEMATISCHE ANNALEN, 1972, 199 (01) : 55 - &

[3] Ambrosetti A., 1973, Journal of Functional Analysis, V14, P349, DOI 10.1016/0022-1236(73)90051-7

[4] BENCI V, CRITICAL POINT THEOR

[5] BROWDER F, 1965, B AM MATH SOC, V71, P174

[6] CHANG K, UNPUBLISHED

[7] CHANG KC, 1978, SCI SINICA, V21, P139

[8] Chang KC, 1978, ACTA SCI NATUR U PEK, P1

[9] VARIANT OF LUSTERNIK-SCHNIRELMAN THEORY [J]. INDIANA UNIVERSITY MATHEMATICS JOURNAL, 1972, 22 (01) : 65 - &

[10] NEW APPROACH TO LAGRANGE MULTIPLIERS. [J]. Mathematics of Operations Research, 1976, 1 (02): : 165 - 174

[1] ELEMENTARY CRITICAL-POINT THEORY AND PERTURBATIONS OF ELLIPTIC BOUNDARY-VALUE PROBLEMS AT RESONANCE [J]. INDIANA UNIVERSITY MATHEMATICS JOURNAL, 1976, 25 (10) : 933 - 944

[2] LUSTERNIK-SCHNIRELMAN THEORY AND NONLINEAR EIGENVALUE PROBLEMS [J]. MATHEMATISCHE ANNALEN, 1972, 199 (01) : 55 - &

[3] Ambrosetti A., 1973, Journal of Functional Analysis, V14, P349, DOI 10.1016/0022-1236(73)90051-7

[4] BENCI V, CRITICAL POINT THEOR

[5] BROWDER F, 1965, B AM MATH SOC, V71, P174

[6] CHANG K, UNPUBLISHED

[7] CHANG KC, 1978, SCI SINICA, V21, P139

[8] Chang KC, 1978, ACTA SCI NATUR U PEK, P1

[9] VARIANT OF LUSTERNIK-SCHNIRELMAN THEORY [J]. INDIANA UNIVERSITY MATHEMATICS JOURNAL, 1972, 22 (01) : 65 - &

[10] NEW APPROACH TO LAGRANGE MULTIPLIERS. [J]. Mathematics of Operations Research, 1976, 1 (02): : 165 - 174