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after the names of the authors of a series of seminal papers, but the theory has also seen fundamental contributions from the work of many others, such as Laurent Freidel (FK model) and Jerzy Lewandowski (KKL model).

Definition

The summary partition function for a spin foam model is

with:

* a set of 2-complexes each consisting out of faces , edges and vertices . Associated to each 2-complex is a weight
* a set

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