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Category Archives: Math
Map of the world
At least as far as families of reflection groups with nice combinatorics are concerned
Posted in Combinatorics, Math
Tagged permutations, complex reflection groups, reflection groups, Coxeter groups
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Ikea proofs
Overheard: He writes a lot of Ikea proofs — all the parts are there,but the reader has to assemble them, and sometimes there are a fewextra parts at the end.
“Magical Mathematics” by Persi Diaconis and Ron Graham
This was a gift from my wonderful friend AHM, following the death of Graham last year. I enjoyed it quite a lot, but it’s also very weird. For example, chapters bounce around dramatically in tone and content (some are about … Continue reading
Posted in Book reviews, Books, Combinatorics, Math
Tagged de Bruijn sequence, Persi Diaconis, Ron Graham
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“Mathematical education” by G. St. L. Carson
This is the other book I mentioned finding at the Book Barn. It is a collection of eight lectures delivered by the author in 1912 and 1913, and a fascinating historical document. Some features that I found particularly interesting follow. … Continue reading
Posted in Book reviews, Books, Combinatorics, Education, Math
Tagged Formalism, Math education
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Trapezoids, and blogs
Atrios remarked on the (slow, inprogress) death of the open internet, as in blogs etc. And Jonathan’s offhand remark about his blog’s heyday is another anecdatum pointing in the same direction. Anyhow, that’s not what this post is about; it’s … Continue reading
Medals per capita
So I made a joke to a friend about how, after Slovenia got their first medal, they were doing really well on a medals per capita basis. And then, being me, I took this joke too far and actually started … Continue reading
Posted in Math, What's the news?
Tagged india, Math humor, Medals, Olympics, Slovenia, South Asia, Sports, Statistics
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American woman math PhDs of the 1940s
Apparently I’ve had this blog for a really long time: just over nine years ago, I wrote about Margaret A. M. Murray’s book “Women Becoming Mathematicians”. This post is just to note that the latest AMS Notices contains an article … Continue reading
Jargon
This tickled my fancy: For all the other parameters, has no real structure. [R. Corran, E.K. Lee, S.J. Lee, Braid groups of imprimitive complex reflection groups, J. Algebra, 2015] (No, it’s not floppy — it’s a complex reflection group. Here … Continue reading
Posted in Combinatorics, Math
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“Trigonethermic”
A coinage of a former student, that makes me happy.
Posted in Education, Math
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