Projective Application
Projective may refer to Mathematics *Projective geometry *Projective space *Projective plane *Projective variety *Projective linear group *Projective module *Projective line *Projective object *Projective transformation *Projective hierarchy *Projective connection *Projective Hilbert space *Projective morphism *Projective polyhedron *Projective resolution Psychology *Projective test *Psychological projection#Projective techniques, Projective techniques See also

* Projection (other) * Projector (other) * Project (other) * Proform, which covers proadjective * Adjective * Injective * Surjective {{disambiguation ...
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Projective Geometry
In mathematics, projective geometry is the study of geometric properties that are invariant with respect to projective transformations. This means that, compared to elementary Euclidean geometry, projective geometry has a different setting (''projective space'') and a selective set of basic geometric concepts. The basic intuitions are that projective space has more points than Euclidean space, for a given dimension, and that geometric transformations are permitted that transform the extra points (called "Point at infinity, points at infinity") to Euclidean points, and vice versa. Properties meaningful for projective geometry are respected by this new idea of transformation, which is more radical in its effects than can be expressed by a transformation matrix and translation (geometry), translations (the affine transformations). The first issue for geometers is what kind of geometry is adequate for a novel situation. Unlike in Euclidean geometry, the concept of an angle does not ...
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