46Mxx Methods of category theory in functional analysis [See also 18XX]
 46M05 Tensor products [See also 46A32, 46B28, 47A80]
 46M07 Ultraproducts [See also 46B08, 46S20]
 46M10 Projective and injective objects [See also 46A22]
 46M15 Categories, functors (For Ktheory, EXT, etc., see 19K33, 46L80, 46M18, 46M20)

46M18 Homological methods (exact sequences, right inverses, lifting, etc.)
(1)
 46M20 Methods of algebraic topology (cohomology, sheaf and bundle theory, etc.) [See also 14F05, 18Fxx, 19Kxx, 32Cxx, 32Lxx, 46L80, 46M15, 46M18, 55Rxx]
 46M35 Abstract interpolation of topological vector spaces [See also 46B70]

46M40 Inductive and projective limits [See also 46A13]
(1)
 46M99 None of the above, but in this section