has an article on: Hilbert space Wikipedia Named after German mathematician David Hilbert (1862–1943). Hilbert space (plural Hilbert spaces) (functional
inner product (and, consequently, a metric) is defined. Cartesian space Hilbert space inner product space real vector space ordinary space type of vector
\leq 1\right\}} ; X ′ {\displaystyle X'} is also a Banach space. complete normed vector space Hilbert space List of Banach spaces on Wikipedia.Wikipedia
of the construct (e.g. Hilbert space). [from 20thc.] Functional analysis is best approached through a sound knowledge of Hilbert space theory. (countable