MSC results for "51"

**51-00**(1980-now) General reference works (handbooks, dictionaries, bibliographies, etc.)

**51-01**(1980-now) Instructional exposition (textbooks, tutorial papers, etc.)

**51-02**(1980-now) Research exposition (monographs, survey articles)

**51-03**(1980-now) Historical (must also be assigned at least one classification number from Section 01)

**51-04**(1980-now) Explicit machine computation and programs (not the theory of computation or programming)

**51-06**(1980-now) Proceedings, conferences, collections, etc.

**51A**(1980-now) Linear incidence geometry

**51B**(1980-now) Nonlinear incidence geometry

**51C**(2010-now) Ring geometry (Hjelmslev, Barbilian, etc.)

**51D**(1980-now) Geometric closure systems

**51E**(1980-now) Finite geometry and special incidence structures

**51F**(1980-now) Metric geometry

**51G**(1980-now) Ordered geometries (ordered incidence structures, etc.)

**51H**(1980-now) Topological geometry

**51J**(1980-now) Incidence groups

**51K**(1980-now) Distance geometry

**51M**(1980-now) Real and complex geometry

**51N**(1980-now) Analytic and descriptive geometry

**51P**(2010-now) Geometry and physics (should also be assigned at least one other classification number from Sections 70–86)