projection set
21Descriptive set theory — In mathematical logic, descriptive set theory is the study of certain classes of well behaved subsets of the real line and other Polish spaces. As well as being one of the primary areas of research in set theory, it has applications to other… …
22Von Neumann–Bernays–Gödel set theory — In the foundations of mathematics, von Neumann–Bernays–Gödel set theory (NBG) is an axiomatic set theory that is a conservative extension of the canonical axiomatic set theory ZFC. A statement in the language of ZFC is provable in NBG if and only …
23Orthographic projection (cartography) — Orthographic projection (equatorial aspect) of eastern hemisphere 30W–150E An orthographic projection is a map projection of cartography. Like the stereographic projection and gnomonic projection, orthographic projection is a perspective (or… …
24Rear-projection television — Rear projection is a type of large screen television display technology. Most very large screen TVs (to 100 inches [254 cm] or more) use rear projection. A variation is a video projector, using similar technology, which projects onto a… …
25Perspective projection distortion — is the inevitable misrepresentation of three dimensional space when drawn or projected onto a two dimensional surface.It is impossible to accurately depict 3D reality on a 2D plane. However, there are several constructs available which allow for… …
26Winkel tripel projection — The Winkel tripel projection (Winkel III) is a modified azimuthal map projection, one of three projections proposed by Oswald Winkel in 1921. The projection is the arithmetic mean of the equirectangular projection and the Aitoff projection [… …
27Wave front set — In mathematical analysis, more precisely in microlocal analysis, the wave front (set) WF( f ) characterizes the singularities of a generalized function f , not only in space, but more precisely also with respect to its Fourier transform at each… …
28Trimetric projection — is a form of axonometric projection, where the direction of viewing is such that all of the three axes of space appear unequally foreshortened. The scale along each of the three axes and the angles among them are determined separately as dictated …
29Homogeneously Suslin set — In descriptive set theory, a set S is said to be homogeneously Suslin if it is the projection of a homogeneous tree. S is said to be kappa homogeneously Suslin if it is the projection of a kappa homogeneous tree.If Asubseteq{}^omegaomega is a… …
30List of set theory topics — Logic portal Set theory portal …
