37-00  General reference works (handbooks, dictionaries,
           bibliographies, etc.)
    37-01  Instructional exposition (textbooks, tutorial papers,
           etc.)
    37-02  Research exposition (monographs, survey articles)
    37-03  Historical (must also be assigned at least one
           classification number from Section 01)
    37-04  Explicit machine computation and programs (not the
           theory of computation or programming)
    37-06  Proceedings, conferences, collections, etc.
   
    37Axx  Ergodic theory [See also 28Dxx]
    37Bxx  Topological dynamics [See also 54H20]
    37Cxx  Smooth dynamical systems: general theory [See also
           34Cxx, 34Dxx]
    37Dxx  Dynamical systems with hyperbolic behavior
    37Exx  Low-dimensional dynamical systems
    37Fxx  Complex dynamical systems [See also 30D05, 32H50]
    37Gxx  Local and nonlocal bifurcation theory [See also 34C23,
           34K18]
    37Hxx  Random dynamical systems [See also 15A52, 34D08,
           34F05, 47B80, 70L05, 82C05, 93Exx]
    37Jxx  Finite-dimensional Hamiltonian, Lagrangian, contact,
           and nonholonomic systems [See also 53Dxx, 70Fxx, 70Hxx]
    37Kxx  Infinite-dimensional Hamiltonian systems [See also
           35Axx, 35Qxx]
    37Lxx  Infinite-dimensional dissipative dynamical systems
           [See also 35Bxx, 35Qxx]
    37Mxx  Approximation methods and numerical treatment of
           dynamical systems [See also 65Pxx]
    37Nxx  Applications