torsion product
81AMX-30 — French AMX 30B2 sporting a 105 rifled tank gun Type Main battle tank Place of origin …
82Torque Game Engine — Infobox Software name = Torque Game Engine caption = Tribes 2 is one of the most noted commercial games to be made with the Torque Game Engine. developer = GarageGames latest release version = 1.5.2 latest release date = May 15 2007 latest… …
83List of formulas in Riemannian geometry — This is a list of formulas encountered in Riemannian geometry.Christoffel symbols, covariant derivativeIn a smooth coordinate chart, the Christoffel symbols are given by::Gamma {ij}^m=frac12 g^{km} left( frac{partial}{partial x^i} g {kj}… …
84Nielsen transformation — In mathematics, especially in the area of abstract algebra known as combinatorial group theory, Nielsen transformations, named after Jakob Nielsen, are certain automorphisms of a free group which are a non commutative analogue of row reduction… …
85Grushko theorem — In the mathematical subject of group theory, the Grushko theorem or the Grushko Neumann theorem is a theorem stating that the rank (that is, the smallest cardinality of a generating set) of a free product of two groups is equal to the sum of the… …
86technology, history of — Introduction the development over time of systematic techniques for making and doing things. The term technology, a combination of the Greek technē, “art, craft,” with logos, “word, speech,” meant in Greece a discourse on the arts, both… …
87Force — For other uses, see Force (disambiguation). See also: Forcing (disambiguation) Forces are also described as a push or pull on an object. They can be due to phenomena such as gravity, magnetism, or anything that might cause a mass to accelerate …
88Volkswagen — Infobox Company company name = Volkswagen Passenger Cars company company type = Subsidiary of Volkswagen Group foundation = 1938 founder = Adolf Hitler, Ferdinand Porsche [ [http://www.time.com/time/magazine/article/0,9171,849010,00.html Joyous… …
89Citroën 2CV — Manufacturer Citroën Production 1948–1990 [1] …
90Slinky — A Slinky is a coil shaped toy invented by mechanical engineer Richard James in Philadelphia, Pennsylvania. [http://web.mit.edu/Invent/iow/slinky.html Inventor of the Week: Archive ] ] It could go down stairs by walking end over end . [ Reader s… …
