|
46-XX - Functional analysis [MSC 2020] |
46A22 - Theorems of Hahn-Banach type; extension and lifting of functionals and operators [MSC 2020] |
54-XX - General topology [MSC 2020] |
46H05 - General theory of topological algebras [MSC 2020] |
46B03 - Isomorphic theory (including renorming) of Banach spaces [MSC 2020] |
46C05 - Hilbert and pre-Hilbert spaces: geometry and topology (including spaces with semidefinite inner product) [MSC 2020] |
46A30 - Open mapping and closed graph theorems; completeness (including $B$-, $B_r$-completeness) [MSC 2020] |