© | << < ? > >> | Dror Bar-Natan: Talks:

**Abstract.** For the purpose of today, an "I-Type Knot Invariant"
is a knot invariant computed from a knot diagram by integrating the
exponential of a *pertubed Gaussian* Lagrangian which is a sum
over the features of that diagram (crossings, edges, faces) of locally
defined quantities, over a product of finite dimensional spaces associated
to those same features.

**Q.** Are there any such things?
**A.** Yes.

**Q.** Are they any good?
**A.** They are the strongest we know per CPU cycle, and are excellent in other
ways too.

**Q.** Didn't Witten do that back in 1988 with path integrals?
**A.** No. His constructions are infinite dimensional and far from rigorous.

**Q.** But integrals belong in analysis!
**A.** Ours only use squeaky-clean algebra.

**URL:** http://drorbn.net/g24.

**Handout:**
IType.html,
IType.pdf.

**Talk Video**@YouTube.

**Talk Video** (mp4).

**Sources:** pensieve.