and Summary of Results -- The Double Category of Framed, Relative 3-Cobordisms -- Tangle-Categories and Presentation of Cobordisms -- Isomorphism between Tangle and Cobordism Double Categories -- Monoidal categories and monoidal 2-categories -- Coends and construction of Hopf algebras -- Construction of TQFT-Double Functors -- Generalization of a modular functor -- From Quantum Field Theory to Axiomatics -- Double Categories and Double Functors -- Thick tangles

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2. Category theory (Mathematics)
3. Homological algebra
4. Commutative algebra
5. Commutative rings
6. Manifolds (Mathematics)
7. Complex manifolds
8. Physics
9. Mathematics
10. Commutative Rings and Algebras
11. Category Theory
12. Homological Algebra
13. Manifolds and Cell Complexes (incl. Diff.Topology)
14. Theoretical
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