The fundamental plane may refer to:
* The fundamental plane which divides a spherical coordinate system.
* The fundamental plane which shows an empirical relationship between mean surface brightness, velocity dispersion and effective radius of an elliptical galaxy.
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Fundamental plane (spherical coordinates) — The fundamental plane in a spherical coordinate system is a plane which divides the sphere into two hemispheres. The latitude of a point is then the angle between the fundamental plane and the line joining the point to the centre of the… … Wikipedia
Fundamental plane (elliptical galaxies) — The fundamental plane for elliptical galaxies relates the effective radius, average surface brightness and central velocity dispersion.MotivationMany characteristics of a galaxy are correlated. For example, as one would expect, a galaxy with a… … Wikipedia
Plane (Dungeons & Dragons) — Ethereal plane redirects here. For the mystical concept, see Etheric plane. The planes of the Dungeons Dragons roleplaying game constitutes the multiverse in which the game takes place. In the earliest versions of Dungeons Dragons, the concept of … Wikipedia
Plane of reference — A term used in celestial mechanics, the plane of reference is the plane by means of which orbital elements (positions) are defined. The two main orbital elements that are measured with respect to the plane of reference are the inclination and the … Wikipedia
fundamental — adj 1 Fundamental, basic, basal, underlying, radical are comparable when they mean forming or affecting the groundwork, roots, or lowest part of something. Fundamental is used chiefly in reference to immaterial things or to abstractions, whether… … New Dictionary of Synonyms
Fundamental polygon — In mathematics, each closed surface in the sense of geometric topology can be constructed from an even sided oriented polygon, called a fundamental polygon, by pairwise identification of its edges. Fundamental parallelogram defined by a pair of… … Wikipedia
Fundamental domain — In geometry, the fundamental domain of a symmetry group of an object or pattern is a part of the pattern, as small as possible, which, based on the symmetry, determines the whole object or pattern. The set of orbits of the symmetry group define a … Wikipedia
Fundamental theorem of algebra — In mathematics, the fundamental theorem of algebra states that every non constant single variable polynomial with complex coefficients has at least one complex root. Equivalently, the field of complex numbers is algebraically closed.Sometimes,… … Wikipedia
Fundamental pair of periods — In mathematics, a fundamental pair of periods is an ordered pair of complex numbers that define a lattice in the complex plane. This type of lattice is the underlying object with which elliptic functions and modular forms are defined. Although… … Wikipedia
Fundamental group — In mathematics, the fundamental group is one of the basic concepts of algebraic topology. Associated with every point of a topological space there is a fundamental group that conveys information about the 1 dimensional structure of the portion of … Wikipedia
