plural of stereographic projection

(projective geometry, complex analysis, cartography) A function that maps a sphere onto a plane; especially, the map generated by projecting each point of the sphere from the sphere's (designated) north pole to a point on the plane tangent to the south pole.

(projective geometry) A line that includes a point at infinity; a line in a projective space; a projective space of dimension 1.

plural of projective line

(informal, politics) The integration of Europe, with cross-border links between European countries. Examples include NATO, the EEC, the EU, the Euro.

plural of projective space

(geometry) A kind of geometrical space in which only relation(s) of incidence between points and lines matter; in such a space distances or angles do not matter and parallelism (as in an affine space) does not matter either.

(geometry) The projection onto an n − 1 dimensional hyperplane (which is extended so as to be projective) of a set of n + 1 affinely independent n-dimensional points (called an affine frame).

plural of project box

A casing or enclosure for electronic components, used by hobbyists to house what they build.