  Mostly self-contained script on functorial topological quantum field
theories. These notes give a slow introduction to the basic notions of category
theory which serve a closer investigation of cobordisms and (commutative)
Frobenius algebras. In the fourth chapter the axiomatic definition of TQFTs is
motivated and some folklore results about the equivalence of (symmetric)
monoidal functors and (commutative) Frobenius algebras are proven. The script
can serve as material for an introductory course.
