Tannaka Duals in Semisimple Tensor Categories

Tannaka duals of Hopf algebras inside semisimple tensor categories are used to construct orbifold tensor categories, which are shown to include the Tannaka dual of the dual Hopf algebras. The second orbifolds are then canonically isomorphic to the initial tensor categories.Comment: 32 pages with 3 figures supplied by tpic command

Exotic Shapes in ^{32}S suggested by the Symmetry-Unrestricted Cranked Hartree-Fock Calculations

High-spin structure of ^{32}S is investigated by means of the cranked Skyrme-Hartree-Fock method in the three-dimensional Cartesian-mesh representation. Some interesting suggestions are obtained: 1) An internal structure change (toward hyperdeformation) may occur at I>20 in the superdeformed band, 2) A non-axial Y_{31} deformed band may appear in the yrast line with 4<I<14.Comment: 10 pages including 6 PS figures, Talk at the Nuclear Structure '98 International Conferenc