After a lot of self-imposed deadline, going back-and-forth with my coauthor, and an aggravating habit of discovering new points we hadn't adequately addressed and for which we needed to put together arguments (including one point we have to work on later, that may be -- well, maybe not big, but interesting; and another problem, this week, that was just me making a careless mistake), my coauthor finally sent the go-ahead: if I believe there's nothing more we need to edit about the textbook, write a cover letter and send it to the publishers.
And so I did.
And went to a restaurant, got a decent meal and an ice cream dessert, and relaxed.
In class news my students in both classes are freaking out over their assignments. One class is at least justifiably quite worked up, about a problem that's harder than any they've done before, and which I've shown only in sketch form how to do in class. The other class is upset about a problem involving an integral that they can't do. I can't do it either; Mathematica needs hints to do it. But there's a table in the lecture notes they can use to avoid doing the integral. I'm almost out of ways to hint ``look at the table on page 12'' without giving the whole thing away.
Oh, and happy birthday to bunny_hugger ... alas, I have to be either 13 hours ahead of time or a day late, but I still like the time zone I'm in.
Trivia: Robert L Stevens (1787-1856) of the Camden and Amboy (New Jersey) Railroad whittled out of wood the original design for the flanged `T' rail as used on railroads today. Source: The Story of American Railroads, Stewart H Holbrook.
Currently Reading: A Crack in the Edge of the World, Simon Winchester.