Another travel day

First an apology: due to using mobile devices to post, the work here recently has been sloppy. A few bad typos, no doubt caused by "auto-correct", have slipped into TNM. Sorry about that.

The regular flow of posting will resume Monday when I return from the left coast. In the meantime, have a great weekend.

Update: Because of comment spamming, comment moderation had to be turned back on.