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zakruti.com » Knowledge, science, education » Numberphile
The Problem with 7825 - Numberphile

The Problem with 7825 - Numberphile

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Rating: 4.0; Vote: 1
The Problem with 7825 Patrik6920: this is lovely, it in a way reminds me of how sir Isac newton showed how to calculated pi accurately down to 50 decimals in a matter of hours. when it previously had taken 30 years get to 16 decimals, it also raisees important questions, if we ignor the failure at 7825. and continue. at the next failure, we note the failure and continue. and so on. each point where it fails. what r the pattern, can we calculate wher it fails. resonable fast. ofc with some thinking we can rduce the problem to a=(m--n-)-, b=4mn, c=(m-+n-)- and solve to se if c has sevral roots. still it will take time calculate. there must be a more elegant way. what if we use a different base instead of Base10. or a fractionalBase.
Date: 2022-04-09

Comments and reviews: 9


Sounds like the reason is. 2 colors works until you get to the first number that is the solution to 2 pythagorean triples. 3 colors would probably work until you get to a number that is the solution to 3 pythagorean triples. 4 colors would probably work until you get to a number that is the solution to 4 pythagorean triples. How to prove that. well it would take a LOT of computing power.
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what if you take in negative numbers? why is this true (not being able to define red of blue) for the number 7258? because you take a system where you start with something you call 0, so you are alrdy using only a binary scale rather than let's say triforce logic to count. lol
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Your videos are like a gradient of -ignotum per ignotius-, to be clear your a phenomenal teacher, the material just seems to get exponentially more bizarre until being borderline incomprehensible. I'm pretty sure this says more about my learning than your teaching.
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I found a solution for -primitive- triples:
odd = red, even = blue
odd-2 + even-2 = odd-2 always.
This solution only fails for:
even-2 + even-2 = even-2
But those triples are non-primitive triples like 6-8-10, which can be reduced to 3-4-5.

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So, what those guys did proof is, that mathematicians create problems that noone else ever had, just to proof that there could be a problem. But they need to proof, that a solution is not possible, just to proof, the problem is a problem. Proof me wrong!
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Realistically, there aren't 512 combinations, but half of that, 256, as there's always an inverse counterpart for a permutation here. Right?
Haven't watched the full, several years old video yet, so sorry if it's mentioned in the video.

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9: 25 -doesn't tell us why-. didn't he explain why? 6: 46 isn't the reason it doesn't work is because it's in two Pythagorean triples? if they know this is the reason it doesn't work, then why do they need to use brute force to prove it?
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Wait, he said this would always fail no matter how many different colors you use. what if I use 7825 different colors? Then it's not possible for any of them to be the same color. Did he misspeak, or did I misunderstand?
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This is about which topic, he just starts with -a new proof has just emerged, which may be the largest proof. - And just starts with the problem. Of which topic? What is the problem? Where did this come from?
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