55Nxx Homology and cohomology theories

• 55N05 Cech types
• 55N07 Steenrod-Sitnikov homologies
• 55N10 Singular theory
• 55N15 $K$-theory, See also {19Lxx}, {For algebraic $K$-theory, See 18F25, 19-XX}
• 55N20 Generalized (extraordinary) homology and cohomology theories
• 55N22 Bordism and cobordism theories, formal group laws, See also {14L05, 19L41, 57R75, 57R77, 57R85, 57R90}
• 55N25 Homology with local coefficients, equivariant cohomology
• 55N30 Sheaf cohomology, See also {18F20, 32C35, 32L10}
• 55N33 Intersection homology and cohomology
• 55N35 Other homology theories
• 55N40 Axioms for homology theory and uniqueness theorems
• 55N45 Products and intersections
• 55N91 Equivariant homology and cohomology, See also {19L47}
• 55N99 None of the above but in this section