User talk:Oscarlevin

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Revision as of 17:27, 11 October 2010 by Zerrakhi (talk | contribs)
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Solutions over multiple lines

I visited the site following the link in your comments on Richard Wiseman's most recent Friday Puzzle solution, and thought I'd see if I could contribute.

However, I can't contribute a solution because the wiki won't accept a solution that takes more than one line. For example, this doesn't work:

{{Solution | 
solution
over
multiple
lines
}}

Pretty much all solutions will require multiple lines, so this is a real problem. I assume a "solution" means an answer with working, whereas an "answer" is just the answer by itself.

Below is my solution to the "7_orbs" puzzle, which I tried to contribute:

Let A = set of orbs for which there are 3 or more others the same colour.
Let B = set of orbs for which there are 1 or 2 others the same colour.
Let X = set of orbs for which there are no others the same colour.
Goal is to prove that some orb is in A.
Possible combinations:
(using the shorthand that A denotes an orb that's in A, etc)
A A A A A A A
A A A A A A X
A A A A A B B
A A A A A X X
A A A A B B B
A A A A B B X
A A A A X X X
Label the orbs 1, 2, 3, 4, 5, 6, 7 and test 1&2, 3&4, 5&6.
Comparing the results of testing those three pairs with the possible combinations, you can easily show that:
If two tested pairs glow the same colour, all members of those pairs are in A
If only one of the three tested pairs glows, members of that pair are in A
If two tested pairs glow different colours and the other doesn't glow, orb 7 is in A
If no tested pairs glow, orb 7 is in A.
In all cases, three tests suffice to prove that some orb is in A.
The only other thing required is to prove that two tests are not necessarily sufficient, which is trivial.

Is that the sort of thing you're looking for? Zerrakhi 12:16, 11 October 2010 (EDT)

Yes that is the sort of thing I'm looking for. I'll see if I can fix the multiple lines problem. Oscarlevin 15:06, 11 October 2010 (EDT)
So I can't seem to replicate your problem. Is it just that the lines are not breaking? Like this:
Solution

solution over multiple lines

Because that can be fixed will a line break between them, as in:
Solution

solution

over

multiple

lines

Or is there some other problem? Oscarlevin 15:25, 11 October 2010 (EDT)
The problem wasn't with your multiple lines, it was with the = sign. Templates allow you to have named parameters, which you assign with =. I don't know if there is a workaround for this. Oscarlevin 15:41, 11 October 2010 (EDT)
Ah. Never thought of that. I just tested in preview mode, and found that nowiki tags around the = sign seemed to work. I've written something up on the Editing Help page. Zerrakhi 19:27, 11 October 2010 (EDT)

No link in email

The email received upon registration, the one containing the words "open this link in your browser", does not actually contain any links or URLs to open! Zerrakhi 12:27, 11 October 2010 (EDT)

Did the email you get contain a bunch of <math></math> tags? I'm using an extension that switches dollar signs to math mode (ala LaTeX), and it has screwed up a lot of the system messages. I'll see if I can fix this too. Oscarlevin 15:06, 11 October 2010 (EDT)
Yes, that's right. Zerrakhi 19:27, 11 October 2010 (EDT)