MSC results for "55"

**55**(1940-now) Algebraic topology

**55-00**(1973-now) General reference works (handbooks, dictionaries, bibliographies, etc.)

**55-01**(1973-now) Instructional exposition (textbooks, tutorial papers, etc.)

**55-02**(1973-now) Research exposition (monographs, survey articles)

**55-03**(1973-now) Historical (must also be assigned at least one classification number from Section 01)

**55-04**(1973-now) Explicit machine computation and programs (not the theory of computation or programming)

**55-06**(1973-now) Proceedings, conferences, collections, etc.

**55B**(1973-1979) Homology and cohomology theories

**55C**(1973-1979) Classical topics [For the topology of Euclidean spaces and manifolds, see 57A05, 57A10, 57A15.]

**55E**(1973-1979) Homotopy groups

**55G**(1973-1979) Operations and obstructions

**55H**(1973-1979) Spectral sequences

**55Q**(1980-now) Homotopy groups

**55S**(1980-now) Operations and obstructions

**55.00**(1959-1972) General

**55.0**(1940-1958) Algebraic topology

**55.25**(1959-1972) Cell-complexes, simplicial complexes

**55.30**(1959-1972) Homology and cohomology theories; $K$-theory

**55.32**(1959-1972) Sheaves

**55.34**(1959-1972) Cohomology operations, Steenrod algebra

**55.36**(1959-1972) Periodic transformations, fixed points, coincidences (Smith theory)

**55.40**(1959-1972) Homotopy theory, general

**55.42**(1959-1972) Algebra of mappings (including cohomotopy groups)

**55.45**(1959-1972) Computation of homotopy groups

**55.52**(1959-1972) Spectral sequences

**55.66**(1959-1972) Generalized manifolds, local homology

**55.68**(1959-1972) Homotopy manifolds

**55.99**(1959-1972) None of the above, but in this section