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< 18Exx | 18-XX | 18Gxx >
18-XX Category theory; homological algebra {For commutative rings see 13Dxx, for associative rings 16Exx, for groups 20Jxx, for topological groups and related structures 57Txx; see also 55Nxx and 55Uxx for algebraic topology}
18Fxx Categories and geometry
18F05   Local categories and functors
18F10   Grothendieck topologies [See also 14F20]
18F15   Abstract manifolds and fiber bundles [See also 55Rxx, 57Pxx]
18F20   Presheaves and sheaves [See also 14F05, 32C35, 32L10, 54B40, 55N30]
18F25   Algebraic $K$-theory and $L$-theory [See also 11Exx, 11R70, 11S70, 12-XX, 13D15, 14Cxx, 16E20, 19-XX, 46L80, 57R65, 57R67]
18F30   Grothendieck groups [See also 13D15, 16E20, 19Axx]
18F99   None of the above, but in this section
< 18Exx | 18-XX | 18Gxx >
 
 
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