tetrad notation

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• Tetrad — may refer to:* Tetrad (chromosomal formation), a chromosomal formation in meiosis * Tetrad (general relativity), a mathematical frame of reference in general relativity * Tetrad (genetics), the four spores of a yeast * Tetrad (Greek philosophy),… …   Wikipedia

• Tetrad (index notation) — In Riemannian geometry, we can introduce a coordinate system over the Riemannian manifold (at least, over a chart), giving n coordinates :xi, i=1,...,n for an n dimensional manifold. Locally, at least, this gives a basis for the 1 forms, dxi… …   Wikipedia

• Newman–Penrose formalism — The Newman Penrose Formalism is a set of notation developed by Ezra T. Newman and Roger Penrose[1] for General Relativity. Their notation is an effort to treat General Relativity in terms of spinor notation, which introduces complex forms of the… …   Wikipedia

• Newman-Penrose formalism — The Newman Penrose Formalism is a set of notation developed by Ezra T. Newman and Roger Penrose [cite journal | author= Ezra T. Newman and Roger Penrose | title=An Approach to Gravitational Radiation by a Method of Spin Coefficients |… …   Wikipedia

• Frame fields in general relativity — In general relativity, a frame field (also called a tetrad or vierbein) is a set of four orthonormal vector fields, one timelike and three spacelike, defined on a Lorentzian manifold that is physically interpreted as a model of spacetime. The… …   Wikipedia

• Cartan connection applications — This page covers applications of the Cartan formalism. For the general concept see Cartan connection.Vierbeins, et cetera The vierbein or tetrad theory much used in theoretical physics is a special case of the application of Cartan connection in… …   Wikipedia

• Marcosians — Gnosticism This article is part of a series on Gnosticism History of Gnosticism …   Wikipedia

• Teleparallelism — (also called distant parallelism and teleparallel gravity), was an attempt by Einstein to unify electromagnetism and gravity. The idea is to use a geometry with a pseudo Riemannian metric of signature (3,1), vanishing curvature, and non vanishing …   Wikipedia

• 53 equal temperament — In music, 53 equal temperament, called 53 TET, 53 EDO, or 53 ET, is the tempered scale derived by dividing the octave into fifty three equally large steps. Each step represents a frequency ratio of 21/53, or 22.6415 cents, an interval sometimes… …   Wikipedia

• Hexany — Regular Octahedron. In music theory, the hexany is a six note just intonation scale, with the notes placed on the vertices of an octahedron, equivalently the faces of a cube. The notes are arranged so that every edge of the octahedron joins… …   Wikipedia

• Tetrads in general relativity — In physics, a tetrad or vierbein is a set of four basis vector fields which can be written in terms of a local coordinate basis by means of tetrad components. For more details see Cartan connection applications, tetrad (index notation).ee also*… …   Wikipedia