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

**Abstract.** If you care only about categorification, the take-home from my talk
will be a challenge: Categorify what I believe is the best Alexander invariant for tangles.

**References.**

- A polynomial time knot polynomial, with van der Veen: A paper on $P_1$ of Theorem 1; a bit dated.
- Everything Around $sl_{2+}^\epsilon$ is DoPeGDO. Hooray!, with van der Veen: A paper on Theorem 1 in full generality, in preparation. More in my talks Everything Around $sl_{2+}^\epsilon$ is DoPeGDO. So what? (video there) and Some Feynman Diagrams in Algebra (video there).
- An Unexpected Cyclic Symmetry of $I{\mathfrak u}_n$, with van der Veen: A paper containing a bit about the $\epsilon$ hidden in semi-simple Lie algebras. A lot more is in my talk What else can you do with solvable approximations? (video there).
- Meta-Monoids, Meta-Bicrossed Products, and the Alexander Polynomial, with Sam Selmani: A paper on $\Gamma$-calculus. More in my talks Algebraic Knot Theory (video there) and Some very good formulas for the Alexander polynomial (video there).
- The Dogma is Wrong: Talk with video; the title says it all.
- From the $ax+b$ Lie Algebra to the Alexander Polynomial and Beyond: An old talk on Alexander and $ax+b$ (video there).
- More on $gl(1|1)$: The Alexander polynomial as quantum invariant of links by Antonio Sartori, Quantum Relatives of Alexander Polynomial by Oleg Viro.
- The Mathematica notebook partially displayed
on the handout is "AlexanderFromHeisenberg" at my
**pensieve**. Said**pensieve**also contains all other source files used for this talk.

**URL:** http://drorbn.net/cat20.