Author |
Topic: Has anyone seen this before? (Read 7916 times) |
|
Benny
Uberpuzzler
Gender:
Posts: 1024
|
|
Has anyone seen this before?
« on: May 7th, 2009, 5:30pm » |
Quote Modify
|
I came across quite accidentally this forum where it discusses http://eqworld.ipmnet.ru/forum/viewtopic.php?f=3&t=128 I'm not familiar with "structural geometry" Then, on the same site, I found at http://eqworld.ipmnet.ru/forum/viewtopic.php?f=3&t=143 y = x2 + 16 y' at x=3 the author finds y'= 10 ... it's quite extraordinary! Okay, this result is bogus. But what about the so-called "structural geometry" at the first link ?
|
|
IP Logged |
If we want to understand our world or how to change it we must first understand the rational choices that shape it.
|
|
|
towr
wu::riddles Moderator Uberpuzzler
Some people are average, some are just mean.
Gender:
Posts: 13730
|
|
Re: Has anyone seen this before?
« Reply #1 on: May 8th, 2009, 12:12am » |
Quote Modify
|
There's probably a reason why all replies in that thread are spam. It's not clear what he's trying to do, nor are his equations even correct in many cases.
|
|
IP Logged |
Wikipedia, Google, Mathworld, Integer sequence DB
|
|
|
Noke Lieu
Uberpuzzler
pen... paper... let's go! (and bit of plastic)
Gender:
Posts: 1884
|
|
Re: Has anyone seen this before?
« Reply #2 on: May 8th, 2009, 1:03am » |
Quote Modify
|
It's awesome- it's like a ghost town or something. ) registered users, 1 guest, when I looked.
|
|
IP Logged |
a shade of wit and the art of farce.
|
|
|
Benny
Uberpuzzler
Gender:
Posts: 1024
|
|
Re: Has anyone seen this before?
« Reply #3 on: Jun 29th, 2009, 12:15pm » |
Quote Modify
|
We start with 2 The second digit is twice the first, the third is twice the second, etc., with "carries" added in as we go along ... and then we stop when we find a number starting with 10. ................................2 ..............................42 ............................842 ........................16842 ......................136842 ......................736842 ..................14736842 ..................94736842 ..............1894736842 ............17894736842 ..........157894736842 ........1157894736842 ........3157894736842 ......63157894736842 ...1263157894736842 ...5263157894736842 105263157894736842 Moving the last 2 to the front gives 210526315789473684, manifestly twice 105263157894736842. This blog also contains Dr. Mutalik's explanation of the phenomenon in terms of arithmetic mod 19.
|
« Last Edit: Jun 29th, 2009, 12:22pm by Benny » |
IP Logged |
If we want to understand our world or how to change it we must first understand the rational choices that shape it.
|
|
|
Benny
Uberpuzzler
Gender:
Posts: 1024
|
|
Re: Has anyone seen this before?
« Reply #5 on: Jun 29th, 2009, 1:23pm » |
Quote Modify
|
on Jun 29th, 2009, 12:34pm, towr wrote:http://en.wikipedia.org/wiki/Parasitic_number |
| Thanks for the link. These numbers are intriguing.
|
|
IP Logged |
If we want to understand our world or how to change it we must first understand the rational choices that shape it.
|
|
|
Benny
Uberpuzzler
Gender:
Posts: 1024
|
|
Re: Has anyone seen this before?
« Reply #6 on: Jul 14th, 2009, 12:08pm » |
Quote Modify
|
Has anyone done this experiment: http://www.youtube.com/watch?v=UB1vd8614gg
|
|
IP Logged |
If we want to understand our world or how to change it we must first understand the rational choices that shape it.
|
|
|
Benny
Uberpuzzler
Gender:
Posts: 1024
|
|
Re: Has anyone seen this before?
« Reply #8 on: Sep 18th, 2009, 2:57pm » |
Quote Modify
|
Binary Clock It has a detail PDF document
|
|
IP Logged |
If we want to understand our world or how to change it we must first understand the rational choices that shape it.
|
|
|
Benny
Uberpuzzler
Gender:
Posts: 1024
|
|
Re: Has anyone seen this before?
« Reply #9 on: Sep 28th, 2009, 2:09pm » |
Quote Modify
|
Have you seen this book : A = B?
|
|
IP Logged |
If we want to understand our world or how to change it we must first understand the rational choices that shape it.
|
|
|
Benny
Uberpuzzler
Gender:
Posts: 1024
|
|
Re: Has anyone seen this before?
« Reply #10 on: Oct 13th, 2009, 1:55pm » |
Quote Modify
|
The Book of Odds is an online statistical encyclopedia. The Book of Odds is a searchable online database of odds statements, the probabilities of everyday life.
|
|
IP Logged |
If we want to understand our world or how to change it we must first understand the rational choices that shape it.
|
|
|
Benny
Uberpuzzler
Gender:
Posts: 1024
|
|
Re: Has anyone seen this before?
« Reply #12 on: Sep 8th, 2010, 10:44pm » |
Quote Modify
|
Furstenberg's Proof of the Infinitude of Primes Quote:Perhaps the strangest is the following topological proof by Fόrstenberg |
| http://primes.utm.edu/notes/proofs/infinite/topproof.html What makes this proof so strange?
|
|
IP Logged |
If we want to understand our world or how to change it we must first understand the rational choices that shape it.
|
|
|
rmsgrey
Uberpuzzler
Gender:
Posts: 2873
|
|
Re: Has anyone seen this before?
« Reply #13 on: Sep 9th, 2010, 7:25am » |
Quote Modify
|
on Sep 8th, 2010, 10:44pm, BenVitale wrote: If you look at the other proofs listed on that site, they are all couched in the language of arithmetic. They talk about taking a list of distinct primes (or a list of numbers that represent distinct primes), performing arithmetic operations on them, and producing a number that represents a new prime. The topological proof is, unsurprisingly, couched in the language of topology, so, while it's actually saying pretty much the same thing as the other proofs - that no finite set of primes can cover the integers with their multiples - there will always be some numbers that aren't divisible by any of the primes in the set, it's saying it in an unusual way. Also, it's a non-constructive existence proof - it doesn't tell you anything about how to find these non-multiples, just that they must exist - the other proofs all tell you where to look for your new prime.
|
|
IP Logged |
|
|
|
towr
wu::riddles Moderator Uberpuzzler
Some people are average, some are just mean.
Gender:
Posts: 13730
|
|
Re: Has anyone seen this before?
« Reply #15 on: Nov 30th, 2011, 10:11pm » |
Quote Modify
|
It actually checks for non-primes And it's a bit irregular for a regular expression, since you can't translate it to a finite state machine.
|
|
IP Logged |
Wikipedia, Google, Mathworld, Integer sequence DB
|
|
|
|