2200  General reference works (handbooks, dictionaries, bibliographies, etc.)


2201  Instructional exposition (textbooks, tutorial papers, etc.)


2202  Research exposition (monographs, survey articles)


2203  Historical (must also be assigned at least one classification number from Section 01)


2204  Explicit machine computation and programs (not the theory of computation or programming)


2206  Proceedings, conferences, collections, etc.



22Axx  Topological and differentiable algebraic systems {For topological rings and fields, see 12Jxx, 13Jxx, 16W80}

22Bxx  Locally compact abelian groups (LCA groups)

22C05  Compact groups


22Dxx  Locally compact groups and their algebras

22Exx  Lie groups {For the topology of Lie groups and homogeneous spaces, see 57Sxx, 57Txx; for analysis thereon, see 43A80, 43A85, 43A90}

22Fxx  Noncompact transformation groups
