There is no mathematics on a dead planet.

I stopped doing mathematics. I spend now most of my time for politics, post-growth economics, collapsology and the fight against ecological breakdown. I can no longer think about toric schemes or local cohomology whilst knowing that my kids will have to fight wars over food and water.

I probably will visit this site at most very rarely. Rather like looking at old photographs and feel a bit of nostalgia.

If you have an urgent mathematical question and think I might know the answer, feel nevertheless free to write me an email (kontakt[at]fredrohrer.ch). If I find the time and can remember enough of this stuff, I might try to help you. But: How about joining the fight and write me about that?