enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Green's identities - Wikipedia

    en.wikipedia.org/wiki/Green's_identities

    In mathematics, Green's identities are a set of three identities in vector calculus relating the bulk with the boundary of a region on which differential operators act. They are named after the mathematician George Green , who discovered Green's theorem .

  3. Green's theorem - Wikipedia

    en.wikipedia.org/wiki/Green's_theorem

    In 1846, the form of "Green's theorem" which appears in this article was first published, without proof, in an article by Augustin Cauchy: A. Cauchy (1846) "Sur les intégrales qui s'étendent à tous les points d'une courbe fermée" (On integrals that extend over all of the points of a closed curve), Comptes rendus, 23: 251–255.

  4. Green's function (many-body theory) - Wikipedia

    en.wikipedia.org/wiki/Green's_function_(many-body...

    In many-body theory, the term Green's function (or Green function) is sometimes used interchangeably with correlation function, but refers specifically to correlators of field operators or creation and annihilation operators. The name comes from the Green's functions used to solve inhomogeneous differential equations, to which they are loosely ...

  5. Reciprocity (electromagnetism) - Wikipedia

    en.wikipedia.org/wiki/Reciprocity_(electromagnetism)

    Reciprocity is also a basic lemma that is used to prove other theorems about electromagnetic systems, such as the symmetry of the impedance matrix and scattering matrix, symmetries of Green's functions for use in boundary-element and transfer-matrix computational methods, as well as orthogonality properties of harmonic modes in waveguide ...

  6. Woman's death now a homicide after skeletal remains found ...

    www.aol.com/womans-death-now-homicide-skeletal...

    A 35-year-old woman's death has been ruled a homicide after her body was found in July near railroad tracks in Merion Village. Latonya Green's skeletal remains were found around 4:30 p.m. on July ...

  7. Schwinger–Dyson equation - Wikipedia

    en.wikipedia.org/wiki/Schwinger–Dyson_equation

    In his paper "The S-Matrix in Quantum electrodynamics", [1] Dyson derived relations between different S-matrix elements, or more specific "one-particle Green's functions", in quantum electrodynamics, by summing up infinitely many Feynman diagrams, thus working in a perturbative approach.

  8. A History of Greenwashing: How Dirty Towels Impacted the ...

    www.aol.com/news/2011-02-12-the-history-of-green...

    The card was decorated with the three green arrows that make up the recycling symbol. Westerveld saw irony in the "save the towel" movement, because hotels waste resources in many different ways ...

  9. Lagrange's identity (boundary value problem) - Wikipedia

    en.wikipedia.org/wiki/Lagrange's_identity...

    In the study of ordinary differential equations and their associated boundary value problems in mathematics, Lagrange's identity, named after Joseph Louis Lagrange, gives the boundary terms arising from integration by parts of a self-adjoint linear differential operator. Lagrange's identity is fundamental in Sturm–Liouville theory.