I'm really glad we got Colleen's medicare coverage straightened out (or mostly -- her Part D (drug) coverage is not fully functional yet, nor is her supplemental policy). Because she went in to Shoreline Clinic for lab work on Tuesday after her visit to the SSA office, and Wednesday we got a call telling her to go to the ER and get IV fluids, because her creatinine level was high. That's related to kidney function, and in this case indicated a problem with her catheter.
So she spent the rest of the week in Northwest Hospital; she was discharged Friday. And Medicare covers it. I spent much of the week doing medicare-related paperwork; being retired may be relaxing once you get to actually do it -- retiring sure isn't. I'm still not done with Colleen's.
Meanwhile, I've been reading. I finished Counterexamples in Analysis, which is a really fun read. It had been used as the textbook for Advanced Calculus up until the year I went to Carleton, so there were enough copies lying around for me to get intrigued by such perverse creatures as "a space-filling curve that's almost everywhere almost nowhere". In the process, supplementing it with Wikipedia dives, I've finally gotten a little more comfortable with ring theory.
Last night, between John Baez on the number 24 on YouTube and a bit of digging on Wikipedia, I also started getting the hang of the Monster Group and E8. They turn out to be related to the Binary Golay code, a 24-bit error-correcting code invented by Marcel Golay, who I knew of because he'd collaborated with my father on the Savitzky–Golay filter!
I've also been reading Operating Systems: Three Easy Pieces - it's mostly review for me, but it's a good presentation and there are a few good nuggets in there. The Codeless Code, a collection of software-development koans, is also worth of note, and of everything I've mentioned here is probably of the most interest to people casually interested in the sociology of software development. Or possibly Zen Buddhism.
I've also been looking around Don Knuth's home page -- Don was my favorite professor at Stanford -- which eventually led me back to Surreal Numbers. I see that I don't have a good set of links for those.