Universal-Lexikon. 2012.
Koopmans' theorem — is an approximation in molecular orbital theory, such as density functional theory, or Hartree Fock theory, in which the first ionization energy of a molecule is equal to the energy of the highest occupied molecular orbital (the HOMO), and the… … Wikipedia
Koopmans-Theorem — Das Koopmans Theorem ist eine nach dem niederländischen Physiker T. C. Koopmans benannte Näherung. In dieser Näherung wird angenommen, dass sich die Lage der Energieniveaus eines Atoms oder Moleküls bei seiner Ionisierung nicht ändert.… … Deutsch Wikipedia
Koopmans — ist der Familienname folgender Personen: Rudy Koopmans (* 1948), niederländischer Boxer Tjalling Koopmans (1910–1985), amerikanischer Ökonom und Physiker niederländischer Abstammung Siehe auch: Koopman Koopmann Koopmans Theorem … Deutsch Wikipedia
Tjalling Koopmans — Infobox Scientist name = Tjalling C. Koopmans image size = 180px birth date = birth date|1910|8|28|mf=y birth place = s Graveland, Netherlands death date = death date and age|1985|2|26|1910|8|28|mf=y death place = New Haven, Connecticut, USA… … Wikipedia
Tjalling C. Koopmans — A Dutch American economist who won the Nobel Memorial Prize in Economics in 1975, along with Leonid Kantorovich, for his research on the optimum allocation of resources and his development of activity analysis. He also developed a chemistry… … Investment dictionary
Ionization potential — The ionization potential, ionization energy or EI of an atom or molecule is the energy required to remove an electron from the isolated atom or ion. More generally, the nth ionization energy is the energy required to strip it of the n th electron … Wikipedia
Eigenvalues and eigenvectors — For more specific information regarding the eigenvalues and eigenvectors of matrices, see Eigendecomposition of a matrix. In this shear mapping the red arrow changes direction but the blue arrow does not. Therefore the blue arrow is an… … Wikipedia
Koopman — or Koopmans is a surname, and may refer to* Bernard Koopman, math * Elias Koopman, motion pictures * Elisabetha Koopman Hevelius, astronomer * Ton Koopman, musician * Tjalling Koopmans, economistee also* Koopman s Porcupine * Koopmans theorem … Wikipedia
Eigenvalue, eigenvector and eigenspace — In mathematics, given a linear transformation, an Audio|De eigenvector.ogg|eigenvector of that linear transformation is a nonzero vector which, when that transformation is applied to it, changes in length, but not direction. For each eigenvector… … Wikipedia
Hartree-Fock — In computational physics and computational chemistry, the Hartree Fock (HF) method is an approximate method for the determination of the ground state wavefunction and ground state energy of a quantum many body system.The Hartree Fock method… … Wikipedia
