**Spherical harmonics** — In mathematics, the spherical harmonics are the angular portion of an orthogonal set of solutions to Laplace s equation represented in a system of spherical coordinates. Spherical harmonics are important in many theoretical and practical… … Wikipedia

**Bra-ket notation** — Quantum mechanics Uncertainty principle … Wikipedia

**Table of spherical harmonics** — This is a table of orthonormalized spherical harmonics that employ the Condon Shortley phase up to degree l=10. Some of these formulas give the Cartesian version. This assumes x, y, z, and r are related to heta, and varphi, through the usual… … Wikipedia

**Controlled Image Base** — or CIB is unclassified digital imagery, produced to support mission planning and command, control, communications, and intelligence systems. CIB is used as a map substitute for emergencies and crises in the event that maps do not exist or are… … Wikipedia

**N-Electron Valence state Perturbation Theory** — In quantum chemistry, N Electron Valence state Perturbation Theory (NEVPT) is a perturbative treatment applicable to multireference CASCI type wavefunctions. It can be considered as a generalization of the well known second order Møller Plesset… … Wikipedia

**Spin-weighted spherical harmonics** — are generalizations of the standard spherical harmonics and like the usual spherical harmonics are complex functions on the sphere. These harmonics are typically denoted by {} sY {lm}, where s is the spin weight , and l and m are akin to the… … Wikipedia

**n-electron valence state perturbation theory** — In quantum chemistry, n electron valence state perturbation theory (NEVPT) is a perturbative treatment applicable to multireference CASCI type wavefunctions. It can be considered as a generalization of the well known second order Møller Plesset… … Wikipedia