Dave Richeson

@divbyzero

Mathematics professor at Dickinson College, author of Tales of Impossibility (2019, Princeton U Press) and Euler's Gem (2008, Princeton U Press). Coffee drinker

Carlisle, PA
Vrijeme pridruživanja: kolovoz 2008.

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  1. Prikvačeni tweet
    22. svi 2019.

    _Tales of Impossibility: The 2000-Year Quest to Solve the Mathematical Problems of Antiquity_ comes out Oct. 8, 2019! It's about the problems of squaring the circle, trisecting an angle, doubling the cube, and constructing regular polygons.

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  2. prije 22 sata

    Cool fact: the archives has a collection of Priestley's scientific equipment. We also have the annual Priestley Award for scientists. Past math recipients include , , John Conway, Tom Banchoff, Donald Knuth,...

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  3. 6. velj

    I have two page-a-day calendars sitting on my desk ⁦(⁩ and ⁦). Today they both refer to it being the 37th day of the year.

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  4. 6. velj

    My daughter: "My English teacher's always saying 'You've never heard of such-and-such band? They were one of the best indie rock bands of the 1980s!' and we're like, 'Um, we're only 13 years old...'"

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  5. proslijedio/la je Tweet
    4. velj

    Is there any solid reason to be against ranked choice voting? I’m honestly asking.

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  6. 4. velj

    After a day with no math—all paperwork, replying to emails, administrative stuff, meetings,... it was so enjoyable to talk to my topology students about different topologies of the real number line during my office hours.

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  7. 4. velj

    1992 was a great year of music (Pavement, Uncle Tupelo, Catherine Wheel, Beastie Boys, Sonic Youth, Lyle Lovett, PJ Harvey, Lemonheads, Yo La Tengo, Red House Painters, etc., etc.), but I'd love to see Copper Blue win out in the end.

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  8. proslijedio/la je Tweet
    3. velj

    A hawk enjoys a squirrel for breakfast on Monday morning at Dickinson College, Carlisle, Pa.

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  9. 3. velj

    Although their website is not up to date, I will be speaking at the Philadelphia Area Seminar on the History of Mathematics at Villanova University on February 20. Title/abstract below.

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  10. 3. velj

    I'm grateful for everyone who rates/reviews my books on and , although, like teaching evaluations, a string of positive comments can be punctuated with ones that may you go 🤦‍♂️. Here are two from Euler's Gem (overall 4.3/5 stars).

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  11. 3. velj

    "You can’t force motivation on a person; that door is locked from the inside."

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  12. proslijedio/la je Tweet
    2. velj

    Performance artist generates virtual traffic jams in Google Maps by pulling a wagon full of smartphones

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  13. proslijedio/la je Tweet

    How is it that Gang of Four's "Entertainment!" isn't available on streaming services??? I wanted to suggest folks listen to it after hearing about the death of guitarist Andy Gill. One of the great records of the last 50 years.

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  14. 1. velj
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  15. 1. velj

    I got a brief “You’re not as uncool as I thought” look from my teenage son. He showed me this video on the logistic map, chaos, & bifurcation diagrams that he thought was interesting. I said, “You know, this [dynamical systems] was the subject of my PhD.”

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  16. proslijedio/la je Tweet

    In Paris, a prizewinning mathematician, Cédric Villani, is running for mayor. “Science can provide solutions to the greatest challenges of our time,” he said.

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  17. 1. velj

    Life in small-town Carlisle: Went out for a Friday happy hour drink with my wife at the local brewpub. The CEO of LL Bean (and alum) is at a neighboring table. As they are leaving I start to introduce myself. “Oh, yeah, you are in the math department, right?”

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  18. 31. sij

    mathematician but does work in a very quantitative field. I'm not linking to the article because I don't want to increase its Google page rank. And I'm not going to name the person or the university because my point isn't to shame anyone.

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  19. 31. sij

    down to a simple procedure and created this applet illustrating the procedure. A few interesting facts. The person who emailed me thought that the article was legit because it was written by a tenured professor at a R1 research school! Said professor is not a

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  20. 31. sij

    Thanks to an email from a reader, I found a compass and straightedge "angle trisection" online. Spoiler alert: it doesn't. But, I was amazed by how close it was to an actual trisection. The person's construction was pretty complicated, but I distilled it

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  21. proslijedio/la je Tweet
    30. sij
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