Trying to rewrite what I was doing last year, I found that I did not understand it any more. It took a few weeks to get in to it again. The main problem seems to be getting started. I am not sure why I am still doing mathematics. May be the old unresolved problems are unconsciously bothering me still. One advantage seems to be that other things look easier though the methodology and experience with mathematics is probably not suitable for thinking about other things apart from noting some logical inconstinencies.