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Quasinormal operator — In operator theory, quasinormal operators is a class of bounded operators defined by weakening the requirements of a normal operator. Definition and some properties Definition Let A be a bounded operator on a Hilbert space H , then A is said to… … Wikipedia
Quasinormal mode — Wave Mechanics= Quasinormal modes (QNM) are the modes of energy dissipation of aperturbed object or field. A familiar example is theperturbation (gentle tap) of a wine glass with a knife: the glass begins toring, it rings with a set, or… … Wikipedia
Quasinormal subgroup — In mathematics, in the field of group theory, a quasinormal subgroup, or permutable subgroup, is a subgroup of a group that commutes (permutes) with every other subgroup. The term quasinormal subgroup was introduced by Oystein Ore in 1937.Two… … Wikipedia
Subnormal operator — In mathematics, especially operator theory, subnormal operators are bounded operators on a Hilbert space defined by weakening the requirements for normal operators. Some examples of subnormal operators are isometries and Toeplitz operators with… … Wikipedia
Olaf Dreyer — at Harvard University Olaf Dreyer (born 1969 in Hamburg) is a German theoretical physicist and postdoctoral fellow in the Department of Applied Mathematics at the University of Waterloo whose research interests include quantum gravity and the… … Wikipedia
Contributors to general relativity — General relativity Introduction Mathematical formulation Resources Fundamental concepts … Wikipedia
Conjugate-permutable subgroup — In mathematics, in the field of group theory, a conjugate permutable subgroup is a subgroup that commutes with all its conjugate subgroups. The term was introduced by Tuval Foguel in 1996 and arose in the context of the proof that for finite… … Wikipedia
Luboš Motl — in 2004 Born 5 December 1973 (1973 12 05) (age 37) … Wikipedia
Immirzi parameter — The Immirzi parameter (also known as the Barbero Immirzi parameter) is a numerical coefficient appearing in loop quantum gravity, a nonperturbative theory of quantum gravity. The Immirzi parameter measures the size of the quantum of area in… … Wikipedia
List of mathematics articles (Q) — NOTOC Q Q analog Q analysis Q derivative Q difference polynomial Q exponential Q factor Q Pochhammer symbol Q Q plot Q statistic Q systems Q test Q theta function Q Vandermonde identity Q.E.D. QED project QR algorithm QR decomposition Quadratic… … Wikipedia
