Viktor Blåsjö

@viktorblasjo

History of mathematics; implications for historiography and philosophy of science, education; polemics thereof.

Utrecht University
Vrijeme pridruživanja: lipanj 2016.

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  1. proslijedio/la je Tweet
    9. sij

    I listened to the first couple of episodes of podcast today, and two things that I value occured: (1) doubt in my prior knowledge, and (2) laughter. Excellent combo.

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  2. proslijedio/la je Tweet
    7. sij

    Very convincing arguments here (I think) about Galileo's incompetence in mathematics (and the scientific method he is purported to have founded). The "Tracks of Galileo" exhibit is about the Brachistochrone Problem, the solution to which he famously blundered...

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  3. proslijedio/la je Tweet
    7. sij

    I've been listening to a fascinating and brutal take-down of Galileo as "father of modern science" on 's podcast Turned a lot of what I thought I knew about Galileo (based on what's written about him just about everywhere) upside down...

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  4. 19. pro 2019.
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  5. 29. stu 2019.

    The history of F=ma is weird. Euler considered it a new (!) law that he was the first to discover (). This brand new paper explains very clearly what Newton meant by his second law (spoiler: underwhelming compared to F=ma):

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  6. proslijedio/la je Tweet
    25. stu 2019.

    The Archimedes palimpsest. It wasn't discovered in 1998, and its story isn't one of science vs. religion. It's a story of stolen antiquities.

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  7. 24. stu 2019.

    Why is F=ma? Leads to the two equivalencies shown. The 1st must be true if joining the blocks shouldn't make a difference. Not sure about best way to argue the 2nd; maybe that, if false, the difference could be used to make a perpetual motion machine. Cf.

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  8. 14. stu 2019.

    My review of 's Infinite Powers: A very nice book indeed, although I stay on brand with some esoteric critique as well.

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  9. 16. lis 2019.

    Ancient Egyptians multiplied via repeated doubling (e.g. ). Why? Why would they rather do ×2 than ×10, even though their number system was base 10? I can't find any scholarship on this. Thread with my speculative answer:

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  10. 25. ruj 2019.

    I translated this book about geometrical manipulations of perspective in the art and architecture of Rome. Can be used as a field guide for a study trip, a coffee table book, or for teaching applied projective geometry through historical examples.

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  11. 21. ruj 2019.
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  12. 21. ruj 2019.

    Some historians think the scientific method never occurred to the Greeks. Even running naked down the street screaming how much you love science is evidently not enough to get these people to open their eyes.

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  13. proslijedio/la je Tweet
    16. ruj 2019.

    Wondering how to motivate work being jointly proportional to force and distance? Check out 's article: Spoiler: think water wheels! See the attached image - artwork my own!

    On the left, underneath the text "double force (twice the water)" a wide stream of water is split in two, such that the water flows over two wheels aligned horizontally. The caption indicates that the work is doubled.

On the right, underneath the text "double distance," two water wheels are stacked vertically, with a single stream of water flowing down over them. The caption indicates that the work is doubled.
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  14. 27. kol 2019.

    This thread on the history of logarithms has all the major food groups I look for in Twitter content: higher-order nerd jokes, genuinely interesting scholarship I didn't know, and stuff about me.

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  15. proslijedio/la je Tweet

    New fav thing (from ) "All mathematicians are familiar with the concept of an open research problem. I propose the less familiar concept of an open exposition problem.

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  16. 24. kol 2019.

    Galileo 🥊✝️ was not about science 💫🔭😇. Galileo was baited 🎣 into trying to explain the Bible 🗣️🛐: a no-no ⛔️ at the heart of a Catholic-Protestant war 🇮🇹🇪🇸⚔️🇩🇪🇳🇱. Galileo's "scientific" account of the Biblical ☀️⏸️ is furthermore self-contradictory.

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  17. 17. kol 2019.

    Historical mathematical locations on this map: Castle where Descartes lived for several years: (very close to present-day Leiden math department: the 1969 q-shaped building to the SW). Huygens family mansion:

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  18. proslijedio/la je Tweet

    “Calculus students in par- ticular are nowadays inculcated with a narrative that paints intuition as a corrupting temptation that must be resisted.” Brilliant article. Carefully researched, and sparkling with wit and appropriate ire.

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  19. 12. kol 2019.

    My brief history of intuition in calculus: Is intuition the opposite of rigor? Did intuition "fail" in the 19th century? No!

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  20. 5. kol 2019.
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