[1] |
Jean-Michel Bony, Principe du maximum, inégalite de Harnack et unicité du problème de Cauchy pour les opérateurs elliptiques dégénérés, Ann. Inst. Fourier (Grenoble) 19 (1969), no. fasc. 1, 277 – 304 xii (French, with English summary). · Zbl 0176.09703 |
[2] |
Haïm Brezis, On a characterization of flow-invariant sets, Comm. Pure Appl. Math. 23 (1970), 261 – 263. · Zbl 0191.38703 · doi:10.1002/cpa.3160230211 |
[3] |
F. H. Clarke, Necessary conditions for nonsmooth problems in optimal control and the calculus of variations, Thesis, University of Washington, 1973. |
[4] |
-, Necessary conditions for nonsmooth variational problems (Proc. Fourteenth Biennial Sem. Canad. Math. Congr., 1974), Springer-Verlag, New York (to appear). · Zbl 0327.49015 |
[5] |
V. F. Dem\(^{\prime}\)janov and V. N. Malozemov, The theory of nonlinear minimax problems, Uspehi Mat. Nauk 26 (1971), no. 3(159), 53 – 104 (Russian). |
[6] |
John M. Danskin, The theory of max-min and its application to weapons allocation problems, Econometrics and Operations Research, Vol. V, Springer-Verlag New York, Inc., New York, 1967. · Zbl 0154.20009 |
[7] |
A. F. Filippov, Classical solutions of differential equations with multi-valued right-hand side, SIAM J. Control 5 (1967), 609 – 621. |
[8] |
William Hogan, Directional derivatives for extremal-value functions with applications to the completely convex case, Operations Res. 21 (1973), 188 – 209. Mathematical programming and its applications. · Zbl 0278.90062 |
[9] |
B. N. Pshenichnyi, Necessary conditions for an extremum, Translated from the Russian by Karol Makowski. Translation edited by Lucien W. Neustadt. Pure and Applied Mathematics, vol. 4, Marcel Dekker, Inc., New York, 1971. · Zbl 0764.90079 |
[10] |
R. M. Redheffer, The theorems of Bony and Brezis on flow-invariant sets, Amer. Math. Monthly 79 (1972), 740 – 747. · Zbl 0278.34039 · doi:10.2307/2316263 |
[11] |
R. Tyrrell Rockafellar, Convex analysis, Princeton Mathematical Series, No. 28, Princeton University Press, Princeton, N.J., 1970. · Zbl 0193.18401 |
[12] |
R. T. Rockafellar, Conjugate convex functions in optimal control and the calculus of variations, J. Math. Anal. Appl. 32 (1970), 174 – 222. · Zbl 0218.49004 · doi:10.1016/0022-247X(70)90324-0 |
[13] |
R. T. Rockafellar, Existence and duality theorems for convex problems of Bolza, Trans. Amer. Math. Soc. 159 (1971), 1 – 40. · Zbl 0255.49007 |
[14] |
Elias M. Stein, Singular integrals and differentiability properties of functions, Princeton Mathematical Series, No. 30, Princeton University Press, Princeton, N.J., 1970. · Zbl 0207.13501 |