## Mathematics Subject Classification – MSC2020

History of calculus of variations and optimal control [Consider also classification numbers from Section 01-XX]
231

Mean field games and control {For partial differential equations, see 35Q89; for game theory, see 91A16}
138

Variational methods for eigenvalues of operators [Should also be assigned at least one other classification number in Section 49-XX] [See also 47A75]
1404

Variational methods for eigenvalues of operators [Should also be assigned at least one other classification number in Section 49-XX] [See also 47A75]
426

Variational principles of physics [Should also be assigned at least one other classification number in Section 49-XX]
3671

Variational principles of physics [Should also be assigned at least one other classification number in Section 49-XX]
3655