|
46A22 - Theorems of Hahn-Banach type; extension and lifting of functionals and operators [MSC 2020] |
46B03 - Isomorphic theory (including renorming) of Banach spaces [MSC 2020] |
46B26 - Nonseparable Banach spaces [MSC 2020] |
54B30 - Categorical methods in general topology [MSC 2020] |
46M18 - Homological methods in functional analysis (exact sequences, right inverses, lifting, etc.) [MSC 2020] |
46B08 - Ultraproduct techniques in Banach space theory [MSC 2020] |
46M10 - Projective and injective objects [MSC 2020] |