mathematics – Konrad Voelkel's Blog

I just found, purely by luck, a recent blog about chromatic homotopy theory and various other mathematical topics. It’s a group blog called Chromotopy, written by Brendan Pawlowski, Eric Peterson, Erik Davis and Stephen Checkoway. They started February 2010.
The first posts (from Feb 2010 to June 2010):

Grand opening
Schreier theory
Jordan type of a modular representation
Bundles for [...]

Notes from a talk I gave in a student’s seminar in Freiburg: Komplexe K-Theorie: Bott-Periodizität

Who thinks conspiracy theories are likely to be true, is a victim of a “Bayesian fallacy”.

A solution to exercises 3.17.4, 3.17.5, 3.9.5, 3.28.3 in Jet Nestruev: “Smooth Manifolds and Observables”, Springer, 2003 and similar problems, along explanations.