Mathematicall Recreations
@RetroMath
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Amateur math historian. (He/Him) I tweet mostly about math and math-adjacent fields and their history.
Joined October 2017
I like this take and think it's correct. And word problems are a genre of literature but that's a totally different discussion.
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Buy his book!
buy my book!!!!
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What's a fraction between 3/4 and 4/5? What was your strategy?
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Are you a mathematician who's having a baby? Here are some nice mathematical names for your child: Epsilon Abscissa Pollygon Quintic Abacus Lemma Vector Max Eureka Tessellate Jacobian Eigen Seven 🧮
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Apropos of the recent conversation about not being handed down generational domestic wisdom ... 😅
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Mathematics, geometry. Retweet if you can find a perfect Five-Pointed Star in this pattern. [From Sam Loyd (1841–1911)] Before you show the answer, why not first share this with friends who might want to see the puzzle, before seeing the answer?
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Looking for an artist to do art for a 12 page TTRPG. Chunky industrial cassette futurism set in the tech level of the 70s and 80s. Cyber, AND punk, heavy on the punk. images below are kind of what we're after. contact the editor @fhartelius for details and to send portfolio.
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We learned that a square is a rectangle but a rectangle isn’t a square in elementary school
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Just now I learned that the opposite of "miniscule" (in the context of typefaces) is "majuscule"
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Stop Reporting Student Test Score Growth In Terms of Standard Deviations Challenge Difficulty: Impossible
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The first time I heard the word "cis" was in high school chemistry.
Don’t tell them about the cis and trans molecules in organic chemistry they’re gonna lose their shit! And definitely don’t say anything about cis and trans regulatory elements in molecular biology!! 🥸
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You've probably been wondering: "How many eels is a cottage worth in 14th C. England?" This is a reasonable question. I get it. And happily, I'm here to help! I included a chart showing this kind of equivalence in an article I wrote for @HistoryExtra, but here's an excerpt!
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Interested in how serious researchers tackle human trafficking challenges?
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I love this graphic design
This cover of “The Icosahedron” by Felix Klein reminds me of Westerns or Science Fiction I used to read as a teenager. But 👋🏼 this was a great adventure that Klein was embarking on, wasn’t it?
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