Who am I talking about? Hypatia of Alexandria, of course. In March of 415 C.E. “she was murdered by a mob of Christians” (for some strange value of “Christians”) according to a well-sourced article in Wikipedia. To see why they… Read More ›
Math
What’s math got to do with it? Alaska’s new voting system would be good for Massachusetts…perhaps.
Because of its small population—despite being the largest state in area—Alaska gets to elect only one member of the U.S. House of Representatives. Until last year it used the traditional system: a separate primary for each party chooses one finalist… Read More ›
Forming Our Future
Eight months ago I wrote a post about our first attempt at interdisciplinarity at the Crimson Summer Academy. It was a start. Perhaps even a good start, but still no more than a start. This summer we are keeping the… Read More ›
Which trig is which?
A friend of mine claims to have had a bad experience with trigonometry in high school. Is this because she had a bad teacher? (Most people blame their teacher.) Or is it because she was a bad student? Or is… Read More ›
“Mathematics is the art of giving the same name to different things.”
You’ve always wanted to learn the truth about the interaction between numbers and names, haven’t you? James Propp will be your teacher. In this month’s Mathematical Enrichments, he makes this observation: Poincaré once wrote “Mathematics is the art of giving… Read More ›
Popular culture, math, and computer science
This puzzle comes from mathematical physicist John Baez. That’s John, not Joan (she is not a mathematical physicist, as far as I know), though they are in fact first cousins. You don’t normally expect that a physicist with a Ph.D…. Read More ›
What’s so beautiful about algebra?
“Nothing,” say some of my students. “You can always find the value of x,” say some others. “It’s useful in real life,” says one. “No it isn’t!” says another. By this point we’ve moved far afield from the original question…. Read More ›
A known unknown? Or maybe it’s an unknown known? Or what?
You do remember Donald Rumsfeld, don’t you? Famous (or infamous) for many things, including the distinction between known unknowns and unknown unknowns, not to mention known knowns and unknown knowns. Confused yet? James Harbeck—whom I’ve cited a dozen times in… Read More ›
Clearly a ¼-pounder is larger than a ⅓-pounder. After all, 4 is larger than 3. Right?
Americans don’t understand numbers—especially when those numbers are fractions. You may know the true story about Arby’s customers who were convinced that a new ⅓-pound burgers contained less meat than the familiar ¼-pounder, since 4 is larger than 3. Maybe… Read More ›
Making math relevant?
Good rhetorical question from SMBC: “Do kids ever look up from Minecraft or Pokemon cards or a Harry Potter book and say ‘This is boring because it’s not relevant to real life’?” And yet that’s exactly what too many kids… Read More ›
Fantastic ______s and Where to Find Them
This book reminds me of the caller who asked the Magliozzi brothers a question about his Volkswagen Quantum: he couldn’t get it repaired because he didn’t know any Quantum mechanics. What’s the connection? Well, first you need to know what… Read More ›
“Dear parents of math geniuses…,” writes Tanya Khovanova
As a teacher, would you prefer hearing from Parent A or Parent B? Parent A: “My ten-year-old finished her calculus course: here is her picture to post on your blog.” Parent B: “My daughter can’t do math, but I told… Read More ›
Math anxiety
When people find out that I’m a math teacher, the most common response among adults over 30 is “I was never any good at math.” An excellent short article in the Harvard Gazette recently explained what’s going on here. The… Read More ›
The solution to that Estonian puzzle
And here is the full solution to the puzzle about telling time in Estonian. First the answers, in case you want to check your answers before following the link to the full solution: Challenge 1a. 9:25b. 11:45c. 2:30d. 3:15e. 6:35… Read More ›
How to tell time (in Estonian, of course)
Alex Bellos, on Atlas Obscura, has written a fine linguistics/math puzzle about telling time in Estonian. No knowledge of Estonian is required (in fact, it would spoil the puzzle), nor is any advanced knowledge of math or linguistics expected. Here… Read More ›
Linguistics/math interface
People keep wondering how I journeyed from linguistics to math. Maybe they’re the same thing:
Gender issues: a perspective from a Russian Jewish mathematician
“My mom used to tell me that most men do not like brainy women,” writes well-known mathematician Tanya Khovanova. Well-known in certain circles, anyway. Female, Russian-American, Jewish—there are a lot of possible identity issues here. I’ve written about Khovanova twice… Read More ›
Wordle, Wheel of Fortune, Jotto, & the Mathematics of Information Theory
Apparently I’m the only person in the world who doesn’t play Wordle. I’m not entirely sure why I don’t, but I can think of a couple of possibilities: it’s far too competitive, it’s far too rigid, and it’s far too… Read More ›
“God created the integers…”
No, it’s not about theology. It’s about math! The title of this book, edited by Stephen Hawking, is the first half of a famous quotation from Leopold Kronecker: “God created the integers, all else is the work of man.” Actually,… Read More ›
Gulp. Are there (were there?) special math problems given only to Jews?
Yes, unfortunately there is (or was?) such a thing. The special problems were, of course, more difficult than the regular math problems. Much more difficult. I learned about this from Tanya Khovanova’s Math Blog, where she explains “how during entrance… Read More ›
Learning Strategies 