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We launched Margins A free online repository where you can
Save and annotate your papers
Share papers and collaborate with anyone
Annotate using LaTeX, Code, Markdown and more
http://fermatslibrary.com/margins pic.twitter.com/eN9E4j49eMThanks. Twitter will use this to make your timeline better. UndoUndo -
Here's a visual proof that (2a+1)²=8Tₐ+1, where Tₐ is a triangle number Tₐ = 1+2+...+a








































































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The Global Seed Vault located in Svalbard, Norway is a storage facility that holds more than 980,000 samples of crops, from almost every country in the world. Its purpose is to safeguard the world’s unique crop genetic material. 2.5 billion seeds may be stored in the Vault.pic.twitter.com/6uaVbgrj1R
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The battery symbol was inspired by the looks of voltaic batteries from the early 19th century.pic.twitter.com/NhPaTEhuBf
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In the 18th century, it was fashionable for men of an intellectual bent to have their portraits painted while wearing banyans and turban-like caps. They believed "loose dresses contribute to the easy and vigorous exercise of the faculties of the mind". Here's Euler's portrait.pic.twitter.com/uaG5TiEkLq
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In 1823, Niels Hendrik Abel managed to prove that there is no algebraic formula to solve equations of degree 5pic.twitter.com/3Agja4l6dL
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The distribution of women and men across academic disciplines seems to be affected by perceptions of intellectual brilliance. Today's paper presents 4 studies performed to assess the perception of brilliance by young children aged 5 to 7. Insightful
: https://fermatslibrary.com/s/gender-stereotypes-about-intellectual-ability-emerge-early-and-influence-children-s-interests …pic.twitter.com/uxH2AF1cw6
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A visual proof A square inscribed in a semicircle has 2/5 the area of a square inscribed in the circle of the same radius.
pic.twitter.com/f3hG51CYhm
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Here's the remarkable coincidence that allows us to see total solar eclipses: the diameter of the Moon is 400 times smaller than the diameter of the Sun, but it is also 400 times closer to us.pic.twitter.com/fp8rVQ94Ad
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Richard Feynman found trigonometry notation to be ambiguous and confusing. "If I had sin f, it looked like s×i×n×f" So he decided to create his own notation. See below.
What do you think?pic.twitter.com/61ByeX7LMz
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When John Bardeen won the 1956 Nobel Prize in Physics, the Swedish king criticized him for not bringing his kids to the ceremony. He promised he would bring them the next time he won - and in 1972, he did when he became the first person to win 2 prizes in the same field.pic.twitter.com/WgBFEPkwZm
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It took us 255 years to go from Galilean transformations for falling bodies to Lorentz transformations that are in accordance with Einstein's special relativity.pic.twitter.com/hY8F60VogW
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This week's paper is a viewpoint article titled “World Scientists' Warning of a Climate Emergency” by William J. Ripple and 11.258 Scientists Signatories. Here's the paper: https://fermatslibrary.com/s/world-scientists-warning-of-a-climate-emergency …pic.twitter.com/mmllmsoFQb
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Fermat dies in 1665 - his last theorem is unsolved ↓
88 y
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Euler proves it for n=3
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72 y
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Legendre & Dirichlet prove it for n=5
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14 y
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Lamé proves it for n=7
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69 y
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Wolfskehl offers prize for solution in the next 100 years
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86 y
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Wiles proves it
pic.twitter.com/cFpYIHpMF0
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The Williams-Kilburn tube introduced in 1947 was the first entirely electronic memory used in early computers. It used a cathode tube to store bits as dots on the screen's surface. Each tube could store about 1024 bits of data.pic.twitter.com/eV0D66LAnO
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377 years ago Pierre Hérigone wrote a six-volume algebra text almost entirely in symbols, in which he first proposed the use of ⊥ (perpendicular) and ∠ (angle).pic.twitter.com/N94FQeQ8c0
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Tree Mountain is an artificial mountain near Ylöjärvi in Finland. Over a period of 4 years 11,000 people planted 11,000 trees in a specifically designed mathematical pattern based on the golden section. The project was conceived by the artist Agnes Denes in 1984.pic.twitter.com/7dNYKhrk0y
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This is the largest known Fibonacci number that's also prime, which is 21925 digits long and was proved prime by Mathew Steine and Bouk de Water in 2015.pic.twitter.com/eu1t2WEvDZ
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Gustav Dirichlet (1805–1859) was a prodigy who at the age of 20 proved that Fermat’s Last Theorem has no solution when n=5pic.twitter.com/RdJdekZARs
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"Truth... is much too complicated to allow for anything but approximations" - John von Neumannpic.twitter.com/PWHORBcp1y
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