# Notes and such

Disclaimer: Some of the material below contains known (mostly innocent)
errors I have not gone back to correct, so use at own risk.

Virtual
2-vector bundles defines an "elliptic cohomology theory"
(Trondhjem, November, 2006). My lecture notes on the proof of
conjecture 5.1 in [BDR].

Excision in
K-theory (Stanford, August 2, 2006). How I
learned to use Beamer.

Perfekte grupper og eksotiske sfærer (Rondablikk Jan. 2003, Norwegian). Some fun with perfect groups, especially the binary icosahedral group.

Prerequisites in algebraic topology (Nordfjordeid Aug. 2002.) Notes for the summer school on motivic homotopy theory.

Stable
motivic homotopy theory (Aarhus 2001.11.27). A presentation
of the joint work with Østvær and Röndigs on a model for
stable motivic homotopy theory posessing good model categories of
modules over ring spectra.

Recent trends and results in algebraic K-theory: a
survey (Uppsala 2001.11.02.) The last decade has seen major advances in algebraic K-theory. Some
of these advances shed light on what K-theory actually is about.
In this lecture I will try to take advantage of this, and talk both
about K-theory in general and more specifically about recent results.

Goodwillie Calculus.
(After T. G. Goodwillie). In Norwegian, (December 29. 1994).
A short and elementary presentation of Goodwillie Calculus, meant
to
be understandable for anybody accepting the word "space".

The syntax of
algebra is governed by finite sets. (October 5th, 1998)
Some unpolished lecture notes from our undergrad topology
seminar.

Nerves of
n-categories. (February 22th 1999)
The very unpolished and totally incomplete lecture notes from
a Bielefeld talk. (slightly less ugly after a brief
polishing in Stanford, June 5th 1999)

Det
syklotomiske spor. In Norwegian, talk at the topology symposium in
Trondhjem, November 10th, 2000

2006-11-28 12:05:27 UTC