# Contents

## Idea

A cobordism category of cobordisms equipped with conformal structure.

One way to axiomatize conformal field theory (see there) in FQFT-style is as a suitable monoidal functor on a category of conformal cobordisms (Segal 88).

## References

• The definition of conformal field theory , in Differential geometrical methods in theoretical physics (Como, 1987), NATO Adv. Sci. Inst. Ser. C Math. Phys. Sci., 250, Kluwer Acad. Publ., Dordrecht, (1988), 165-171

Two-dimensional conformal field theories and modular functors , in Proceedings of the IXth International Congress on Mathematical Physics , Swansea, 1988, Hilger, Bristol (1989) 22-37.

The definition of conformal field theory , preprint, 1988; also in: Topology, geometry and quantum field theory , ed. U. Tillmann, London Math. Soc. Lect. Note Ser., Vol. 308. Cambridge University Press, Cambridge (2004) 421-577.

Review in the context of the Mumford conjecture is in

• Ib Madsen, section 2.2 of Moduli spaces from a topological viewpoint, Proceedings of the International Congress of Mathematics, Madrid 2006 (2007) (pdf)

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