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, See also {34K35}
• 49K27 Problems in abstract spaces [See 90C48, 93C25]
• 49K30 Optimal solutions belonging to restricted classes
• 49K35 Minimax problems
• 49K40 Sensitivity of optimal solutions in the presence of perturbations
• 49K45 Problems involving randomness, See also {93E20}
• 49K99 None of the above but in this section