### 53-XX Differential geometry,

{For differential topology, See
57Rxx. For foundational questions of differentiable manifolds, See 58Axx}
- 53-00 General reference works (handbooks, dictionaries, bibliographies, etc.)
- 53-01 Instructional exposition (textbooks, tutorial papers, etc.)
- 53-02 Research exposition (monographs, survey articles)
- 53-03 Historical (must be assigned at least one classification number from 01-XX)
- 53-04 Explicit machine computation and programs (not the theory of computation or programming)
- 53-06 Proceedings, conferences, collections, etc.
- 53Axx Classical differential geometry
- 53Bxx Local differential geometry
- 53Cxx Global differential geometry, see also {51H25, 58-XX; for related bundle theory, See 55Rxx, 57Rxx}

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