Semiclassical Limits of Extended Racah Coefficients

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  • 22 July 1998
Abstract
We explore the geometry and asymptotics of extended Racah coeffecients. It is shown the extension may be geometrically identified with two types of Lorentzian tetrahedra for which all the faces are timelike. The asymptotic formulae derived for the extension are found to have a similar form to those for the standard SU(2) 6j symbol. We briefly discuss this model's applicability to (2+1) Lorentzian Quantum Gravity.

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