a couple corrections and a few more details
Mostly self-explanatory. The details have been added since I think it's too tricky a proof to just talk away in one paragraph. Haven't tried to compile; I hope nothing is stupidly wrong.
Mostly self-explanatory. The details have been added since I think it's too tricky a proof to just talk away in one paragraph. Haven't tried to compile; I hope nothing is stupidly wrong.