Why do prime numbers make these spirals? | Dirichlet’s theorem and pi approximations
October 8, 2019
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22:21Now PlayingWhy do prime numbers make these spirals? | Dirichlet’s theorem and pi approximations
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as posted by the channelA curious pattern, approximations for pi, and prime distributions.
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Based on this Math Stack Exchange post:
Want to learn more about rational approximations? See this Mathologer video.
Also, if you haven't heard of Ulam Spirals, you may enjoy this Numberphile video:
Dirichlet's paper:
Timestamps:
Corrections:
Dirichlet observed this equal distribution numerically and noted this in his paper, but it wasn't until decades later that this fact was properly proved, as it required building on some of the work of Riemann in his famous 1859 paper. If I'm not mistaken, I think it wasn't until Vallée Poussin in (1899), with a version of the prime number theorem for residue classes like this, but I could be wrong there.
In many ways, this was a very silly error for me to have let through. It is true that this result was proven with heavy use of complex analysis, and in fact, it's in a complex analysis lecture that I remember first learning about it. But of course, this would have to have happened after Dirichlet because it would have to have happened after Riemann!
My apologies for the mistake. If you notice factual errors in videos that are not already mentioned in the video's description or pinned comment, don't hesitate to let me know.
Thanks to these viewers for their contributions to translations
Hebrew: Omer Tuchfeld
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If you want to check it out, I feel compelled to warn you that it's not the most well-documented tool, and it has many other quirks you might expect in a library someone wrote with only their own use in mind.
Music by Vincent Rubinetti.
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