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3,899,571 Views • Feb 19, 2022 • Click to toggle off description
00:00 Intro
04:16 The vortex
08:10 The maths of remainders and digital roots
13:25 Demystifying the vortex
16:30 A matter of base. The 8 fingered Tesla.
19:21 Explanation why the digital root is the remainder on division by 9
24:01 Tristan's challenge
24:44 The magic of modular multiplication maths
25:19 Intuition for multiplier - 1 petals
28:23 Thank You!
Coding competition:
My wish list for the modular times table diagram app:
-Being able to color line segments according to length.
-Indication of the "direction" of multiplication. 1x2 = 2 and so there should really be a little arrow from 1 to 2 not just a simple connection :)
-different loops in different colors.
...
Here is the prize, a copy of my and Marty's new book.
bookstore.ams.org/mbk-141/
That early Mathologer video featuring the modular times tables
Times Tables, Mandelbrot and the Heart of Mathematics
• Times Tables, Mandelbrot and the Hear...
A really nice article about various ways to generate the cardioid by Dave Richeson
divisbyzero.com/2018/04/02/i-heart-cardioids/
Nice debunking/demystifying article about vortex math by "Professor Puzzler"
www.theproblemsite.com/vortex/
For a growing pile of implementation of modular times table diagrams see my comment pinned to the top of the comment section of this video.
Simon Plouffe's website
plouffe.fr/Simon%20Plouffe.htm
Articles by him relevant to this video can be found in this directory
plouffe.fr/Inverseofprimes/
See in particular the files
The shape of b^n mod p.pdf
La forme de bn mod p.pdf
What I am talking about in this video is really just the tip of a bizarre mathematical iceberg that most mathematically minded people are completely unaware of. Have a look at this presentation by Marko Rodin on vortex math (beware serious nutty and at the same time truely beautifully presented numerology ahead :) A LOT more than is usually reported on in popular YouTube videos.
sciencetosagemagazine.com/vbm-vortex-based-mathema…
In turn this iceberg is just another tip of an even bigger iceberg of mainly wishful thinking. Have a look: sciencetosagemagazine.com/category/library/
Today's music: Aftershocks by Ardie Son
Enjoy!
Burkard
Views : 3,899,571
Genre: Education
Date of upload: Feb 19, 2022 ^^
Rating : 4.876 (2,434/75,929 LTDR)
RYD date created : 2024-05-05T06:02:43.258287Z
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YouTube Comments - 7,004 Comments
Top Comments of this video!! :3
I once created a small computer program that used exponentiated polar conversions to achieve an infinite number of possible cardioid shapes (like the ones you found), and suddenly it started showing flower petals and other "real" things we see in day-to-day life, all from equations in my code. The universe is a wild place and exploring it with your own hands has to be one of the most satisfying experiences!
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In school whenever I noticed patterns such as these divisibility tests, my teachers discouraged me from pursuing them because they themselves were not sure if they'd always hold and were concerned they'd lead me astray. Another example that I recall is my noticing that each power of two is equal to one more than the sum of the lesser powers of two. That's well-established and taken for granted in computer science, yet was unknown to my teachers and regarded with skepticism. I remember also my mom pleading with my teachers to stop counting my work wrong for my daring to use techniques I developed myself from having explored the mathematical foundations of the rote mechanisms they taught. I understand that the pressures on elementary school math teachers drive them to stick with safe techniques, but for them to feel threatened by a student privately moving beyond that is frankly an indictment of the whole system of education.
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I am just a little younger than you, but I hated math in school because every teacher was so dry and boring, I love numbers now, where were all the people like you back then that could have spurred my curiosity much earlier in life. I love when you show your true passions and giggle about it.
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My maths skills have always been lacking but I find this absolutely fascinating. Just learning about digital roots, the shortcuts for dividing by nine and finding the remainders is blowing my tiny mind. I’ll probably have to watch it a few times.
Yep, definitely have to watch it a few times.
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Division by 7 always produces 142857. Spare key to the Universe, if you lost the master copy
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I was taught the concept in elementary school, under the name “casting out nines”. Sadly, it was presented as a trick or technique, without real explanation, which I had to discover for myself. So much is lost when mathematics is taught as a bag of techniques without the underlying beautiful patterns!
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Tesla didn't throw the 3-6-9 principle out there because there was anything super special about the numbers themselves, but because they correspond with certain realities about electromagnetism, waves, oscillation, vibration, spin, and curvature as found in nature. Or in other words, it's not about the bare math, but how well 3-6-9 applies in the context of physics. It's the basis of 240 VAC @ 60 cps as the most efficient formula for producing electrical power.
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What i found amazing about the doubling sequence is that the embryon (and all the cells ) is using this exact sequence of doubling as well as the processor architecture.
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Looks like I unknowingly introduced this to myself and my wife and daughters with a little game we used to play while travelling. We would add up the numbers on license plates and see who came up with the "digital root" the quickest, even though we didn't know that was the term to use. We saw very quickly that any combination of numbers that add up to 9 could be eliminated so 572 would be 5 without going through the process of adding. Later, as 3 or 4 number plates lost its challenge, we included letters. The letters "I" and "R" could automatically be eliminated since they corresponded to the number 9 and 18 respectively. This expanded the challenge because you had to figure out the numbers corresponding to the letters. As you played the game this became more intuitive when you could eliminate combinations of letters that added up to 9 for elimination. Example GSP562 would be 1. One of my daughters got so good at it that within seconds she could get the digital root of signs with just letters such as names of towns or short sentences.
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I the 1950's I was taught to check math problems by something the teacher called "casting out nines." I didnt know why it worked but was intrigued by it. 60 years later I stubble across the answer.
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Hi, I’ve been looking all over the ‘net, libraries etc. and written text is so slim on the ground! I recall being amazed, when as 9 yr kid, finding the symmetry of the 9X table. Then as time wore on, through school and on, I stumbled across Teslas’ Vortex diagram. Watching this video has opened my eyes to more patterns!!
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Thank you for your clear, intuitive, and expansive explanations, illustrations, and wry sense of humor!
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As an American born-and-raised who was in the public system as both student and teacher… our math education is disgustingly deficient in number theory.
High school graduates (even some going into stem fields) do not even know the Euclidean algorithm. They have almost no experience working with modular arithmetic.
Too many decades of parents complaining about this “useless” math subject has led to them and their children being mystified by the simplest of number theory diagrams.
Thank you mathologer for making so much explanatory content paced for victims of the US public school number theory book banning.
(Inb4 some other American tells a story about their one teacher that taught them number theory)
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9:23
I'm a high-school maths teacher. I have taught that dumbed-down divisibility-by-9 test without going into digital-roots and the remainder property. I shall never do it again. Props to your deliciously made videos.
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Wow, I could listen to you all day! If I had had you for a math teacher in high school for a semester or two, I would have majored in mathematics in university! I hope you are teaching young people somewhere. Thank you!!
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Super cool as always. This looks pretty accessible. I hope to find time to look into Seymour's explanation. Thanks!
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You, sir, are brilliant. I’ve never seen something so complex, presented in such a simple way, that was so incredibly easy to follow. Please don’t ever stop making these videos. They, and you, are terrific. Thank you.
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"A conspicuously simple and universal pattern is more likely a feature of the observer's perspective than the universe being observed." ... seems a more profound lesson than anything one could wring from an obsession over Tesla circles. Thanks!
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That's mind blowing 🤯 I really didn't want the video to end. Thank you so much 👍
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@Mathologer
2 years ago
(updated 2 April 2022) Thank you to all of you who contributed a modular times table app. All the apps I am aware of are listed below. The winner of the draw is Mathis Aaserud. Congratulation! Here are a few implementation contributed by viewers so far. Look at these first: Adam Abrams: theadamabrams.com/modularmultiplication Ed Collen: vortex-rho.vercel.app/ Andrew “Ash Mystic” Herman: codepen.io/hippiefuturist/full/NrvqgZ (check out the preset animations on this one. Also check out his fractal tree generator codepen.io/hippiefuturist/full/KRromj ) Man Hin Li: mandelbrot.vercel.app/ Liam Applebe: tiusic.com/vortex.html Owen Bechtel: owenbechtel.com/games/times-tables/ William Ward: scratch.mit.edu/projects/647469837/ Артём Маевский: tinyurl.com/yc8danxx Baxi: baxi-codes.github.io/mathologer-vortex/ Marc Donis: madc0w.github.io/cardioid/ Rafael Castro Couto: codepen.io/rafaelcastrocouto/pen/KKyoKWm Laurent Bucher: anceps.net/modularTimesTables.html Hannes Wendt: htts://math.wendt.sbs/vertex Hugo Cardoza: Code in p5js editor.p5js.org/hugomosh/sketches/1Sg1NxqI7 john Schoeman: www.doodles.camp/#/doodles/modular-times-table Banjamin Elo: bnelo12.github.io/vortex-math/ Joe Lucette: jluqu.github.io/modmult.html Federico Marotta: federico-marotta.shinyapps.io/tesla_vortex T3CHN01200: victorsohier.github.io/ Tom DeRensis: github.com/tderensis/ModularTimesTableJavascript Ehsan Kia: ehsankia.com/cjs/vortex Jayson Vivet: www.geogebra.org/m/cufneprj Tyler Wolfe-Adam: mathologer-vortex-app.herokuapp.com/ Andrea Coletta: mathologer-modular-time-table.lm.r.appspot.com/app Mathis Aaserud: sirkular.ispaceyourtube.com/ Justin Kirk: intern-jck.github.io/vortex-math/ Jarred Branch: no online version Álvaro Silva: mathlogervortexalvaro.web.app/ Rafael Castro Couto: codepen.io/rafaelcastrocouto/pen/KKyoKWm planck_cst: www.jerpint.io/blog/mathologer-challenge/ Anton Shcherbinin: ch.ant-on.net/modulo/moire?p=1009&m=303 Cristian Merighi: js.pacem.it/2d/vortex Krischna-Gabriel Schulz: no online version András Kirisics: kiri-mathologer-vortex.web.app/ relikd: relikd.github.io/Vortex-Math/ Eclectic Gamer: https://youtu.be/n_YLB0ncbpI (Video on using Blender and Geometry nodes to make these diagrams) Some existing implementations of the modular times table diagrams: Aymeric Ramiere: www.aymericramiere.com/others_modular.html Steve Phelps: www.geogebra.org/m/z8wrdret#material/dqKkQEv7 I did this a while ago: www.qedcat.com/cardioid.cdf Marcus Metzler: github.com/drmocm/Modulo-graphics Start of a wish list for the modular times table diagram coding competition: -Being able to color line segments according to length. -Being able to highlight different loops in different colors. -Indication of the "direction" of multiplication. 1x2 = 2 and so there should really be a little arrow from 1 to 2 not just a simple connection :) ...
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