Poincaré group
Poincaré group In physics and mathematics, the Poincar� group is the group of isometries of Minkowski spacetime. It is a 10-dimensional noncompact Lie group. The abelian group of translations is a normal subgroup while the Lorentz group is a subgroup, the stabilizer of a point. That is, the full Poincar� ...
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Particle physics and representation theory
Particle physics and representation theory There is a natural connection, first discovered by Eugene Wigner, between the properties of particles, the representation theory of Lie groups and Lie algebras, and the symmetries of the universe. This postulate states that each particle "is" an irreducible representation of the symmetry group of the ...
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Polarization
Polarization Circular Elliptical Consider first the special case (left) where the two orthogonal components are in phase. In this case the strength of the two components are always equal or related by a constant ratio, so the direction of the electric vector (the vector sum of these two components) will always ...
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Weinberg-Witten theorem
Weinberg-Witten theorem Steven Weinberg and Edward Witten consider the so-called emergent theories to be misguided. During the 80's, preon theories, technicolor and the like were very popular and some people were speculating that gravity might be an emergent phenomena or that gluons might be composite. So, they came ...
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Wigner's classification
Wigner's classification In mathematics and theoretical physics, Wigner's classification is a classification of the nonnegative energy irreducible unitary representations of the Poincar� group, which have sharp mass eigenvalues. It was proposed by Eugene Wigner, for reasons coming from physics -- see the article particle physics and representation theory. The mass ...
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Supersymmetry algebra
Supersymmetry algebra In theoretical physics, the supersymmetry algebra is a mathematical formalism for describing the relation between bosons and fermions. In a supersymmetric world, every boson would have a partner fermion of equal rest mass. To explore the consequences of this assertion—and to attempt to explain why the present-day world ...
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Talk:Polarization
Talk:Polarization merge This is three articles banged together -- can someone copyedit this? Done. Excised text: Polarization in telecommunications: Of an electromagnetic wave, the property that describes the orientation, i.e., time-varying direction and amplitude, of the electric field vector. Note 1: States of polarization are described in terms of ...
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Talk:Ordinary differential equation
... of a late work by Sauvage (1895). Poincar\'e's recent contributions are also very ... generalization of the work of Fuchs and Poincar\'e in the case of differential equations ... the normal integrals of Thomé, integrals which Poincar\'e has called "intégrales anormales," and which ...
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User:Mathbot/Recent log
... in /m1/aoleg/wp/articles/P removed `Poincar\303\251_half-plane_model.wiki' Parsing of undecoded ... in /m1/aoleg/wp/articles/P removed `Poincar\303\251\342\200\223Bendixson_theorem.wiki' Parsing ...
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Conformal symmetry
Conformal symmetry In theoretical physics, conformal symmetry is a symmetry under dilatation (variation of scale) and under the special conformal transformations. Together with the Poincar� group these create the conformal symmetry group. The conformal group has the following representation in spacetime: $M\_\{\backslash mu\backslash nu\}\backslash equiv-i(x\_\backslash mu\backslash partial\_\backslash nu\; ...$
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