Bram Cohen ([info]bramcohen) wrote,
@ 2007-12-25 12:24:00
Previous Entry  Add to memories!  Tell a Friend!  Next Entry
Puzzle ring question answer
Times up on my puzzle ring pattern challenge. Nobody gets the cookie.

To refresh, the question was what the pattern/generalization of this design is:
___   ___   ___   ___   ___   ___   ______
   \ /   \ /   \ /   \ /   \ /   \ /
    \     \     \     /     /     /
___/ \   / \   / \   / \   / \   / \   ___
      \ /   \ /   \ /   \ /   \ /   \ /
       \     \     \     /     /     /
___   / \   / \   / \   / \   / \   / \___
   \ /   \ /   \ /   \ /   \ /   \ /
    /     /     /     \     \     \
___/ \   / \   / \   / \   / \   / \   ___
      \ /   \ /   \ /   \ /   \ /   \ /
       /     /     /     \     \     \
___   / \   / \   / \   / \   / \   / \___
   \ /   \ /   \ /   \ /   \ /   \ /
    /     /     /     \     \     \
___/ \___/ \___/ \___/ \___/ \___/ \______


And the answer is that if you chop the pattern up into four quadrants, and the crossings all go the same way within each quadrant, like so:
___   ___   ___   ___|  ___   ___   ______
   \ /   \ /   \ /   \ /   \ /   \ /
    \     \     \    |/     /     /
___/ \   / \   / \   / \   / \   / \   ___
      \ /   \ /   \ /|  \ /   \ /   \ /
       \     \     \ |   /     /     /
___   / \   / \   / \|  / \   / \   / \___
---\-/---\-/---\-/---\-/---\-/---\-/------
    /     /     /    |\     \     \
___/ \   / \   / \   / \   / \   / \   ___
      \ /   \ /   \ /|  \ /   \ /   \ /
       /     /     / |   \     \     \
___   / \   / \   / \|  / \   / \   / \___
   \ /   \ /   \ /   \ /   \ /   \ /
    /     /     /    |\     \     \
___/ \___/ \___/ \___/ \___/ \___/ \______


This can be scaled up or down to any number of bands, for example the classic design is four bands
___   ___   ___   ___   ______
   \ /   \ /   \ /   \ /
    \     \     /     /
___/ \   / \   / \   / \   ___
      \ /   \ /   \ /   \ /
       /     /     \     \
___   / \   / \   / \   / \___
   \ /   \ /   \ /   \ /
    /     /     \     \
___/ \___/ \___/ \___/ \______


And it can be chopped into quadrants as well
___   ___   ___|  ___   ______
   \ /   \ /   \ /   \ /
    \     \    |/     /
___/ \   / \   / \   / \   ___
------\-/---\-/+--\-/---\-/---
       /     / |   \     \
___   / \   / \|  / \   / \___
   \ /   \ /   \ /   \ /
    /     /    |\     \
___/ \___/ \___/ \___/ \______


I also gave the three banded version in a previous post. The five-banded design works as well, but I don't like that as much because it doesn't have a strong canonical position which the bands want to go into like they do with four or six.



(Post a new comment)


[info]colindean
2007-12-30 07:01 pm UTC (link)
I thought you might find this interesting, but you may have already seen it if you peruse Slashdot:

http://www.sciencenews.org/articles/20071222/bob11.asp

(Reply to this)

hey
[info]booger_dawson
2008-01-02 04:11 am UTC (link)
Hey Bram whats up? I just wanted to wish you and your family a Happy New Year man!

- Booger

(Reply to this)

lambda network
[info]lkcl
2008-01-23 03:28 pm UTC (link)
bram - that's a lambda network.
p.s. can i ask you a favour: can you please contact me, i need to talk with you about debtorrent. many thanks.

(Reply to this)


Create an Account
Forgot your login?
Login w/ OpenID
English • Español • Deutsch • Русский…