A few things

I have posted a another new version og Extensions on the web, where the errors we discovered during the lecture are corrected.

There is no lecture on Tuesday October 1.

On Thursday September 26 and Thurday October 3. I'll be a way, but Kristian Ranestad will be a substitute. 

When I am back, on Tuesday 8. I'll do problem 11 in the notes on  Extensions on the board.

Geir