duality
81principle of duality — a principle in projective geometry: from a geometric theorem another theorem may be derived by substituting in the original theorem the word point for the word line in the case of a point or line in the plane or the word point for the word plane… …
82wave-particle duality — Principle that subatomic particles possess some wavelike characteristics, and that electromagnetic waves, such as light, possess some particlelike characteristics. In 1905, by demonstrating the photoelectric effect, Albert Einstein showed that… …
83wave-particle duality — noun The concept applying to all matter and radiation, but most evident in light and particles such as the electron, that properties of waves and of particles are exhibited simultaneously …
84hallucination of physical duality — see out of body experience (OBE or OBEE) …
85ДУАЛЬНОСТЬ СТРУКТУРЫ — (duality of structure) (в формулировке Гидденса, 1984) концепция социальной структуры, а также среды и результата социальной деятельности. См. Структура тонная теория …
86String theory — This article is about the branch of theoretical physics. For other uses, see String theory (disambiguation). String theory …
87Dual polyhedron — The dual of a cube is an octahedron, shown here with vertices at the cube face centers …
88Nondualism — is a term used to denote affinity, or unity, rather than duality or separateness or multiplicity. In reference to the universe it may be used to denote the idea that things appear distinct while not being separate. The term nondual (meaning not… …
89Dual problem — In constrained optimization, it is often possible to convert the primal problem (i.e. the original form of the optimization problem) to a dual form, which is termed a dual problem. Usually dual problem refers to the Lagrangian dual problem but… …
90Mirror symmetry (string theory) — In physics and mathematics, mirror symmetry is a relation that can exist between two Calabi Yau manifolds. It happens, usually for two such six dimensional manifolds, that the shapes may look very different geometrically, but nevertheless they… …
