> 46-XX Functional analysis > 46MXX Methods of category theory in functional analysis

46M05 Tensor products	46M07 Ultraproducts	46M10 Projective and injective objects
46M15 Categories, functors	46M18 Homological methods (exact sequences, right inverses, lifting, etc.)	46M20 Methods of algebraic topology (cohomology, sheaf and bundle theory, etc.)
46M35 Abstract interpolation of topological vector spaces	46M40 Inductive and projective limits	46M99 None of the above, but in this section

46MXX Methods of category theory in functional analysis