> 49-XX Calculus of variations and optimal control; optimization > 49KXX Necessary conditions and sufficient conditions for optimality

49K05 Free problems in one independent variable	49K10 Free problems in two or more independent variables	49K15 Problems involving ordinary differential equations
49K20 Problems involving partial differential equations	49K22 Problems involving integral equations	49K24 Problems involving differential inclusions
49K25 Problems involving equations with retarded arguments	49K27 Problems in abstract spaces	49K30 Optimal solutions belonging to restricted classes
49K35 Minimax problems	49K40 Sensitivity, stability, well-posedness	49K45 Problems involving randomness
49K99 None of the above, but in this section

49KXX Necessary conditions and sufficient conditions for optimality