basic commutator
81Planck constant — Planck s relation redirects here. For the law governing black body radiation, see Planck s law. Values of h Units 6.62606957(29)×10−34 J·s[1] 4.135 …
82Dirac, P.A.M. — ▪ English physicist in full Paul Adrien Maurice Dirac born August 8, 1902, Bristol, Gloucestershire, England died October 20, 1984, Tallahassee, Florida, U.S. English theoretical physicist who was one of the founders of quantum mechanics… …
83Sturgeon, William — ▪ British electrical engineer born May 22, 1783, Whittington, Lancashire, Eng. died Dec. 4, 1850, Prestwich, Lancashire English electrical engineer who devised the first electromagnet capable of supporting more than its own weight. This… …
84Commutative property — For other uses, see Commute (disambiguation). In mathematics an operation is commutative if changing the order of the operands does not change the end result. It is a fundamental property of many binary operations, and many mathematical proofs… …
85Noncommutative algebraic geometry — is a branch of mathematics, and more specifically a direction in noncommutative geometry that studies the geometric properties of formal duals of non commutative algebraic objects such as rings as well as geometric objects derived from them (e.g …
86Siemens , Ernst Werner von — (1816–1892) German engineer The son of a farmer from Lenthe in Germany, Siemens was the eldest of fourteen highly talented children, who included William Siemens. In 1834 he joined the Prussian army and spent three years in Berlin receiving a… …
