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math-ph2008★ 19 cited
The Ponzano-Regge asymptotic of the 6j symbol: an elementary proof
Razvan Gurau
In this paper we give a direct proof of the Ponzano-Regge asymptotic formula for the Wigner 6j symbol starting from Racah's single sum formula. Our method treats halfinteger and in…
hep-th2008★ 1 cited
La renormalisation dans la theorie non commutative des champs
Razvan Gurau
Non commutative quantum field theory is a possible candidate for the quantization of gravity. In our thesis we study in detail the model on the Moyal plane with an harmonic po…