49XX CALCULUS OF VARIATIONS AND OPTIMAL CONTROL; OPTIMIZATION [See also 34H05, 34K35, 65Kxx, 90Cxx, 93XX]
 4900 General reference works (handbooks, dictionaries, bibliographies, etc.)
 4901 Instructional exposition (textbooks, tutorial papers, etc.)
 4902 Research exposition (monographs, survey articles)
 4903 Historical (must also be assigned at least one classification number from Section 01)
 4904 Explicit machine computation and programs (not the theory of computation or programming)
 4906 Proceedings, conferences, collections, etc.
 49Jxx Existence theories
 49Kxx Optimality conditions
 49Lxx HamiltonJacobi theories, including dynamic programming

49Mxx Numerical methods [See also 90Cxx, 65Kxx]
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 49Nxx Miscellaneous topics
 49Qxx Manifolds [See also 58Exx]
 49Rxx Variational methods for eigenvalues of operators [See also 47A75] (should also be assigned at least one other classification number in this section)
 49Sxx Variational principles of physics (should also be assigned at least one other classification number in this section)