Integrable Models of the CFT on Hyper-Elliptic Surfaces

In this letter, we continue the work we started at a previous paper and we propose new series of integrable models in quantum field theory. These models are obtained as perturbed models of the minimal conformal field theories on the hyper-elliptic surfaces by particular relevant operators of the untwisted sector. The quantum group symmetry of the models is also discussed.Comment: Postscript file available at http://www.tau.ac.il/~costas/papers/HES-2.ps; revised version to appear in Phys. Lett.

The Ascending Double-Cone: A Closer Look at a Familiar Demonstration

The double-cone ascending an inclined V-rail is a common exhibit used for demonstrating concepts related to center-of-mass in introductory physics courses. While the conceptual explanation is well-known--the widening of the ramp allows the center of mass of the cone to drop, overbalancing the increase in altitude due to the inclination of the ramp--there remains rich physical content waiting to be extracted through deeper exploration. Such an investigations seems to be absent from the literature. This article seeks to remedy the omission.Comment: LaTeX, 16 pages, 18 eps figure