GPHI

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• Holomorph (mathematics) — In mathematics, especially in the area of algebra known as group theory, the holomorph of a group is a group which simultaneously contains (copies of) the group and its automorphism group. The holomorph provides interesting examples of groups,… …   Wikipedia

• Torsion (mechanics) — In solid mechanics, torsion is the twisting of an object due to an applied torque. In circular sections, the resultant shearing stress is perpendicular to the radius.For solid or hollow shafts of uniform circular cross section and constant wall… …   Wikipedia

• Bullough-Dodd model — The Bullough Dodd model is an integrable model in 1+1 dimensional quantum field theory. Its Lagrangian density is:mathcal{L}=frac{1}{2}(partial muphi)^2 frac{m 0^2}{6g^2}(2e^{gphi}+e^{ 2gphi})where m 0, is a mass parameter, g, is the coupling… …   Wikipedia