It looks like you're new here. If you want to get involved, click one of these buttons!
I hope to actually finish the proof of the deficiency zero theorem. In the book version it shouldn't take as long as it has here, because I'll do some stuff in earlier sections. There's a beautiful picture here, which also involves electrical circuit theory, but I'm sort of making it up as I go, so it's not perfected, and it's coming out in dribs and drabs now.
This section starts with a long review, which I've written... but I haven't written the meat yet!