January 12, 2013 § 1 Comment
So, at tea this afternoon:
Me: Hey, Vivienne, here’s a cool math problem:
Vivienne: [skeptical expression]
Me: Suppose I give you an envelope with $20 in it, and I have another
envelope with either half that much or twice that much in it. I offer
to trade the envelope you’ve got for the one I have. Do you take the
Vivienne: No. $20 is enough.
After twelve years of marriage, sometimes I can’t tell whether she
loves me, or whether she hates me but we get along well.
January 5, 2013 § Leave a comment
My dear friend Ben Collins-Sussman has just turned 40! Please join me in congratulating him, and in associating his name with that web page. Ahem.
December 31, 2011 § 3 Comments
On Twitter, I asked:
Sincere question: do any of you have a linear algebra introductory text that you really liked?
(Man, this blog is just going to rocket to the top of the charts, I can tell.)
Here’s what people mentioned:
- Many folks like Linear Algebra and Its Applications, by Gilbert Strang, $285. “The gold standard.” “Pretty good.” Strang is an MIT professor, and his lectures are available through the MIT OpenCourseWare site. (Thanks, @bos31337, @froydnj, and @TerryHancock1!)
- Algebra, by Michael Artin, $129. This one was recommended by @graydon2, so: 95% chance profound and beautiful; 50% chance completely beyond my depth.
- Several folks mentioned the curiously-named Linear Algebra, by Serge Lang, $77. Thanks, @nataren and @cbrozefsky!
- Dave Herman‘s uncle wrote a text on geometric intuitions for linear algebra using Maple/Mathematica! $135.
- Linear Algebra and Its Applications, by David C. Lay, $172. “… but mostly I was just relieved to finally be taking math that wasn’t calc, so.” A ringing endorsement! (Thanks, @lindsey!)
Prices are from Powell’s Books, for comparison. Powell’s prices aren’t the lowest, but I consider the physical bookstore (and especially the technical bookstore, oh my goodness) a substantial side benefit, so I try to buy from them anyway. But, wow, tutelage on the fundamental truths of the universe is not cheap. However much I love bookstores, I think I might like open-sourced textbooks even more…
December 18, 2011 § Leave a comment
On Twitter, I wrote:
Between ARIA, Saiunkoku, and Akage no Anne, we may’ve watched enough anime with our girls about women who work hard and achieve their goals.
Some folks were interested, so here are some details on those series.
First, some things you should know about our tastes in anime:
- They run strongly towards the gentle and slow-paced, because that’s what our girls (9 and 6) like. If your kids think Jurassic Park is great fun, this isn’t the list for you. If we ever watched something even as severe as, say, Star Wars, they would be crying so loudly I wouldn’t be able to hear Luke tell Obi-wan, “I want to come with you to Alderaan.” (Which is a problem… how?)
- Every single one of these series extolls the virtues of hard work and an honest, forthright character. The truth is, I’m not sure I could explain to the next generation why being an anarchist punk isn’t the better choice. I sure hope good parenting doesn’t entail making the family a miniature of the world outside.
- It’s surprisingly easy to find anime that passes the Bechdel Test, so why settle for less? (I hear a lot about how constraining Japanese society is for women, and I believe it, but I also come across a lot that doesn’t fit neatly into that picture.)
So, the anime:
A young woman leaves Earth to be an apprentice gondolier in a rebuilt Venice on a terraformed Mars. But it’s barely sci-fi at all; it’s entirely about the characters, about the nature of kindness, friendship, study, and community. The sense of place in Aria is so strong, I wanted to move to Neo-Venezia myself. The plots are idiosyncratic: nobody else has ever had a character undertake a punishment campaign against her own left hand.
If you have a limited tolerance for sweetness, Aria will probably give you diabetes. “Cool” is big in American culture, and Aria has nothing to do with detachment and independence. But from 2004 to 2009, when I was avidly (compulsively) following the cruel and banal mendacity that is American politics, watching Aria on Fridays was like a balm for my soul. There’s something there. Aria makes you wonder why arguments and conflict are such essential ingredients in almost all drama when you can actually have great stories without them.
There’s a bit of Fan service in one early episode, which usually bugs me (it’s condescending to the viewers, and also strikes me as disrespectful to the characters—whatever that means), but please forgive it. It’s nothing my girls even blinked at.
Shuurei, a young woman in a poor but noble family, is roped into being the king’s consort in an attempt to awaken his interest in ruling. He falls in love with her, but she aspires to become a government official, even though the civil service exam is not open to women. Predictably, the king gets the rules changed, and Shuurei aces the exam.
A good bit of the series deals with Shuurei’s troubles gaining the respect of her colleagues despite her manifest competence, and the reactions of the male-dominated court culture to the introduction of a woman. Her supporters hesitate to intervene on her behalf, knowing that her detractors are eager to attribute her success to favoritism. But she perseveres and triumphs.
Visually, Saiunkoku is weak; this is classic cheap Japanimation. The fun is all in the plot, which is pretty complicated. It definitely goes over our 6-year-old’s head, and our 9-year-old misses a lot too, but there’s enough for the kids to latch on to that they seem to enjoy it as well.
- Akage no Anne
This is an anime adaptation of Anne of Green Gables, a novel set in 1878 Canada about a young girl who is adopted by an elderly couple. She goes to school; makes friends; climbs a roof on a dare and falls off; accidentally gets her best friend drunk on currant wine; and so on. She is an accomplished student, gains admission to Queen’s Academy, and wins a scholarship to college.
The story often sympathetically articulates Anne’s adoptive parents’ feelings; I was glad to have that angle set out to our girls.
Isao Takahata and Hayao Miyazaki worked together on this anime.
January 6, 2011 § Leave a comment
The future masters of technology will have to be light-hearted and intelligent. The machine easily masters the grim and the dumb.
—Marshall McLuhan, 1969
I love this quote. It roughly fits what I’ve seen. But while it seems clear that being ‘dumb’ probably dooms you to being mastered by the first anything (person, cause, addiction, …) you encounter, why would being light-hearted have anything to do with it?
December 20, 2010 § Leave a comment
I ran a half-marathon last Sunday, the first race I’ve ever run.
It had been raining and miserable all week, but on Sunday morning it was clear, warm, and beautiful—we couldn’t have asked for better weather. The bus wasn’t convenient, and it was too early in the morning to ask our wives for a ride, so Kevin and I decided to bike there: 5 miles for me, 9 miles for Kevin. We left my house at 7:15 and got there on time. It was a big crowd, 1200 runners, people of all ages and shapes (but not all sizes). The starting gun was at 8:15; with everyone lined up, it took us 30 seconds just to get to the starting line. They had the streets blocked off, with traffic cones, police directing traffic, mile markers, and so on.
The route started at Adidas’ North American headquarters, went up to Pier Park at the northern end of Portland, and then turned around and came back. My map omits about two miles of squiggles they added at the beginning to get the requisite length, but you can see how it goes along the cliffs to the east of the Willamette, past the University of Portland campus, under the St. Johns bridge, and past Pier Park. From the cliffs, we could see all the way to downtown. I was surprised at how far away it was; we’d started the day on the far side of downtown, and come the distance on our own power.
About two thirds of the way to the turnaround, the lead runner passed us coming back—so he was going about twice as fast as we were! Kevin and I ran at our own pace, and even walked a bit when we felt like it. Many more people passed us, including plenty of little old ladies, than vice versa. But it’s a race against yourself, not some random person next to you.
Every so often they had a station set up where you could grab a cup of water or a packet of sugary energy goop. Water is obviously a good thing; I ate some goop about half-way through, and it definitely helped.
At roughly the half-way mark, we passed one woman standing off to the side throwing up. Later on, she passed us! Don’t you think that, if you’re throwing up, perhaps you should slow down?
We finished in 2 hours and 10 minutes, roughly a ten-minute mile on average. I’d been expecting to take between two to two and a half hours, so I was happy to be towards the faster end. I bet we could have done even better if we hadn’t biked. After we stopped, I felt fantastic—my heart and lungs were saying, “Piece of cake!”—but I could tell that if I didn’t keep walking around, my legs were ready to cramp up in a way far worse than anything I’d ever experienced before. I did keep walking, and things were fine. (Well, “within expectations” would be more honest.) At the finishing site there was more water, free soup, cornbread muffins, and… free beer! Kevin had a bowl of soup and a (pretty big) cup of beer. I had a bowl of soup. I started a beer, but my stomach said, “EVIDENTLY THERE HAS BEEN SOME SORT OF MISCOMMUNICATION”, so I dumped the beer under a bush.
Biking back, it rained on us a bit, but not with much sincerity. I was grateful for the essentially perfect weather during the race. Vivienne had french toast coming off the griddle as we walked in the door; Kevin stayed for a quick bite, and then biked the rest of the way home.
I had a great time, and I definitely want to do it again. I’d like to beat 2 hours. I have no interest in doing a full marathon.
Why did you run? Were you chased?
I was both chased and led, by the usual things.
I can’t honestly claim that fear of heart disease played any factor in the decision, although it should have. I haven’t lost weight. It hasn’t helped my sleep as much as switching pillows. And I don’t think it has helped my concentration. Some people say exercise brings a general sense of well-being, but, aside from the occasional bout of black despair, I’m generally pretty cheerful on my own. And I do go down stairs clutching the railing like an old man, after a longer run.
But I turn out to be immune to equipment fetishism. And I seem to be able to avoid the sorts of competitive feelings I find ugly.
I think the real reasons are these: It had aspects of a dare, mostly against my self-image as a pale geek who’d gotten used to being the last pick at school by third grade. And once I’d gotten started, I found that it felt really good, in a way that nothing else I do does; there’s surprising satisfaction in knowing that you can handle it. And I enjoy Kevin’s company.