ABSTRACT
In this chapter, we construct of a (2 + 1)-dimensional TQFT by a state sum approach. We shall once and for all assume that we have a fusion algebra A https://s3-euw1-ap-pe-df-pch-content-public-u.s3.eu-west-1.amazonaws.com/9780429186912/45d2c13a-8f9e-405d-95c0-12927fe9a9e5/content/eq289.tif"/> with intertwiner spaces.
