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Abstract: Starting from a recently-introduced algebraic structure on spin foam models,we define a Hopf algebra by dividing with an appropriate quotient. Thestructure, thus defined, naturally allows for a mirror analysis of spin foammodels with quantum field theory, from a combinatorial point of view. Agrafting operator is introduced allowing for the equivalent of aDyson-Schwinger equation to be written. Non-trivial examples are explicitlyworked out. Finally, the physical significance of the results is discussed.



Autor: Adrian Tanasa

Fuente: https://arxiv.org/







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