Mathematicall Recreations (@RetroMath) header
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Amateur math historian. (He/Him) I tweet mostly about math and math-adjacent fields and their history.

Joined October 2017
Photo by Mathematicall Recreations (@RetroMath)Photo by Mathematicall Recreations (@RetroMath)Photo by Mathematicall Recreations (@RetroMath)Photo by Mathematicall Recreations (@RetroMath)Photo by Mathematicall Recreations (@RetroMath)Photo by Mathematicall Recreations (@RetroMath)Photo by Mathematicall Recreations (@RetroMath)Photo by Mathematicall Recreations (@RetroMath)Photo by Mathematicall Recreations (@RetroMath)
Mathematicall Recreations retweeted
New tempting ways to serve bananas.
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What's a fraction between 3/4 and 4/5? What was your strategy?
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Mathematicall Recreations retweeted
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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Mathematicall Recreations retweeted
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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Mathematicall Recreations retweeted
We learned that a square is a rectangle but a rectangle isn’t a square in elementary school
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Mathematicall Recreations retweeted
1938 Cost of Living.
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Mathematicall Recreations retweeted
From a 1979 IBM presentation
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Mathematicall Recreations retweeted
honey, the biblically correct octonions have escaped the lab again
someone needs to check on the condensed matter physicists they are cooking up something satanic
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Unpopular opinion: Memorising lots of digits of pi is a total waste of time! It has NOTHING to do with mathematics.
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No comments.
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Delightful and useful electrical display instrument to follow baseball games in real time, from "Scientific American", 1891 ("Electric Baseball").
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Mathematicall Recreations retweeted
Exact trig values from 1833 ... gulp! ... but they do beg the question, why do we continue to teach those for 30°, 45° & 60°? ... they're used exclusively for contrived exam questions ... to what end?
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#math meme
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chapgpt is such a wuss lol
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Mathematicall Recreations retweeted
a theory of proportions
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The fact that dudes go on a diet but they call it "biohacking" is so funny to me. Like if men started knitting they would call it "hyper threading" or "powertangling" or some shit
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I don't know who needs to hear this, but the Pythagorean Theorem is NOT "a² + b² = c²."
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