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

**Abstract.** This will be a very "light" talk: I will explain why about
13 years ago, in order to have a say on some problems in knot theory,
I've set out to find tangle invariants with some nice compositional
properties. In my second talk in Bonn I will explain how such invariants
were found - though they are yet to be explored and utilized.

**Handout:**
AKT.html,
AKT.pdf,
AKT.png.

**Talk Video** (in Sydney, on
September 16).

**Links:**
AlexDemo
KBH
SS
Vo
WKO1
talks

**Sources:** pensieve.

**Abstract.** I will explain how the computation of compositions of
maps of a certain natural class, from one polynomial ring into another,
naturally leads to a certain composition operation of quadratics and to
Feynman diagrams. I will also explain, with very little detail, how this
is used in the construction of some very well-behaved poly-time computable
knot polynomials.

Joint work with Roland van der Veen.

**Handout:**
FDA.html,
FDA.pdf,
FDA.png.

**Talk Video** (at UCLA).

**Sources:** pensieve.