Cartilaginous fishes having horizontally flattened bodies and enlarged winglike pectoral fins with gills on the underside; most swim by moving the pectoral fins
In mathematics and the foundations of quantum mechanics, the projective Hilbert space P {\displaystyle \mathbf {P} } of a complex Hilbert space H {\displaystyle H} is the set of equivalence classes of non-zero vectors v {\displaystyle v} in H {\displaystyle H}, for the relation ∼ {\displaystyle \sim } on H {\displaystyle H} given by w ∼ v {\displaystyle w\sim v} if and only if v = λ w {\displaystyle v=\lambda w} for some non-zero complex number λ {\displaystyle \lambda }.
Ray was a British short-run little avant-garde art magazine, designed, edited, and financed by the English artist and designer Sidney Hunt from its start in 1926 to its demise in 1927.
Preferred languages to be displayed in the selection menus
Please note that, in order to improve your browsing experience on this website,
BabelNet® uses various types of cookies, including: browsing functionality,
performance and statistical cookies.
By continuing to browse the site you are agreeing to our use of cookies.
OK
