Dualprojection
Dualprojection, or dual projection, is a term used in several disciplines to describe a projection operation together with its dual counterpart defined through a duality between spaces. The exact meaning depends on context, but it typically involves an idempotent linear map and its action on a dual space or dual configuration.
In linear algebra and functional analysis, a projection P: V → V satisfies P^2 = P. The associated
In probability theory and Banach space theory, conditional expectation operators are canonical examples of projections on
In projective geometry, a dual projection can refer to a projection interpreted in the dual projective space,
Because dualprojection is context-dependent, it is used to describe the relationship between a projection and its