## Search found 45 matches

Fri Mar 15, 2013 3:30 pm UTC
Forum: Mathematics
Topic: Collatz thoughts.
Replies: 10
Views: 3805

### Re: Collatz thoughts.

The previous poster has retracted their claim elsewhere, but they didn't mention what errors were found.
Wed Nov 21, 2012 11:20 pm UTC
Forum: Mathematics
Topic: Fermat's Last Theorem
Replies: 76
Views: 13792

### Re: Fermat's Last Theorem

PlanetMath has a walkthrough of a similar paper that you presented about five years ago. Is this the same paper, or has it been revised? I've been looking through case A, and I see serious problems right after equation (13). (uwv + v n ) n + (uwv + w n ) n = (uwv + v n + w n )...
Sun Jun 05, 2011 11:27 am UTC
Forum: Mathematics
Topic: Math is a language, not a science?
Replies: 87
Views: 23519

### Re: Math is a language, not a science?

Restricting "mathematics" to take place only within consistent systems seems a little bit excessive. Part of dealing with consistent systems is differentiating them from inconsistent systems, and even finding ways to disentangle the two if they collide somehow. This doesn't change the fact...
Mon Apr 25, 2011 5:04 pm UTC
Forum: Coding
Topic: Coding: Fleeting Thoughts
Replies: 9955
Views: 1932180

### Re: Coding: Fleeting Thoughts

FT: "frobnicate" is a word? I guess you do learn something new every day. I'm pretty sure it's just a placeholder. The example we're using seems to have gotten a little muddled, since some folks are coding "process valid input while we have it" and others are coding "error ...
Sun Mar 27, 2011 12:15 am UTC
Forum: Mathematics
Topic: Math: Fleeting Thoughts
Replies: 427
Views: 143556

### Re: Math: Fleeting Thoughts

I'm not great with probability, but since the problem says
rat4000 wrote:I win if at least two of the dice are sixes
doesn't P(winning on a roll) ≠ P(two sixes)?
Thu Jul 29, 2010 3:32 pm UTC
Forum: Mathematics
Topic: Exponents with Trigonometric Functions/Logs/etc.
Replies: 41
Views: 5180

### Re: Exponents with Trigonometric Functions/Logs/etc.

But it would only apply to trigonometric functions, as it has been said, there isn't much use of compounding trigonometric functions so that's why that particular notation works without much argument against it. That makes sense, I was just curious because I haven't seen that notation before. Trigo...
Tue Jul 27, 2010 9:13 am UTC
Forum: Mathematics
Topic: Exponents with Trigonometric Functions/Logs/etc.
Replies: 41
Views: 5180

### Re: Exponents with Trigonometric Functions/Logs/etc.

Wikipedia has a short note on notation on the inverse function page that covers most of the uses for f n (x) I've seen. The section above that briefly mentions why the notation f -1 (x) might have appeared in the first place, though I can't vouch for its accuracy. Raising it to a positive multiple o...
Sun Jun 20, 2010 6:55 pm UTC
Forum: Mathematics
Topic: Math: Fleeting Thoughts
Replies: 427
Views: 143556

### Re: Math: Fleeting Thoughts

Sorry I didn't see this yesterday, thank you so much for the reply. That's a really clever method of showing that every n j is uniquely enumerated, which is also a much clearer way to support the assertion I made about the enumeration of 3 m . And I have to admit that I looked at your induction proo...
Sat Jun 19, 2010 8:51 am UTC
Forum: Mathematics
Topic: Math: Fleeting Thoughts
Replies: 427
Views: 143556

### Re: Math: Fleeting Thoughts

I figured I'd necromance this thread because I suspect this has a simple approach I'm missing, though this problem is also very likely beyond my abilities. I'd greatly appreciate any tips or thoughts on directions I should research. It's not homework (fortunately). For m > 0 and odd n, 1 ≤ n ≤ 3 m ,...
Wed Sep 09, 2009 8:34 pm UTC
Forum: Mathematics
Topic: A Good Problem
Replies: 7
Views: 1365

### Re: A Good Problem

... So let us just omit the above cases i.e. p=6k+1 as well r = 6b+2 (b=0,1,...). Now can the problem be proved or does it still has counter example, Also your counter example is a special one because the prime factors aren't unique in your case it is 3,7,7,31. I checked only for those with unique ...
Wed Mar 25, 2009 11:55 pm UTC
Forum: Coding
Topic: Rather novice yet puzzling bash scripting issues
Replies: 8
Views: 1086

### Re: Rather novice yet puzzling bash scripting issues

I am not a *nix person, but you might try changing sh /home/hellmitre/scripts/start_deluge.sh & to source /home/hellmitre/scripts/start_deluge.sh A little bit of Googling seems to indicate that using sh will spawn a new shell that exits when it has finished executing the shell script, probably t...
Tue Jun 17, 2008 6:19 pm UTC
Forum: Coding
Topic: PHP Removing the backslash
Replies: 19
Views: 3452

### Re: PHP Removing the backslash

If you're ever on a shared hosting setup or someplace where you can't turn off magic quotes, there's also stripslashes().
Sat Feb 23, 2008 7:11 pm UTC
Topic: Webcomic "Browser"
Replies: 7
Views: 1870

### Re: Webcomic "Browser"

Sorry about double-necro-posting, but the auto-parser is finally up and working. ( Normal version , Safari/graphical bug version .) There are two ways to trigger the autoparser; the first method is to paste a URL in the prepend box, and if the jumpbox (box inbetween back and forward buttons) is empt...
Sun Jan 27, 2008 9:44 am UTC
Topic: Webcomic "Browser"
Replies: 7
Views: 1870

### Re: Webcomic "Browser"

This is a great idea! I think further improvements could inclue a drop-down box with popular "presets". I think it also would be best for some comics if it referenced the image file directly, instead of the regular page. That would remove the alt-text, though. Something to think about. I ...
Sun Jan 27, 2008 9:11 am UTC
Forum: Music
Topic: Song Identification!
Replies: 458
Views: 191874

### Re: Song Identification!

Aah help help help! I just heard a song on the radio which I liked about two seconds ago but they didn't say what it was, and I couldn't understand the words. It was a male singer, with acoustic guitar backing in a sort of repetitive arpeggio kind of thing, and I think some of the lyrics were "...
Tue Jan 22, 2008 7:31 pm UTC
Topic: Webcomic "Browser"
Replies: 7
Views: 1870

### Re: Webcomic "Browser"

Leaving a little bar hanging off the top is a great idea, thank you for mentioning that. Although getting it to play nicely with text resizing is a bit of a problem, I'll reupload the file when I get it working. (Edit: a version is up and working here , but Safari has a graphical bug due to the ugly...
Tue Jan 22, 2008 8:16 am UTC
Topic: Webcomic "Browser"
Replies: 7
Views: 1870

### Webcomic "Browser"

While this has certainly been done before, I figured there might be a person or two who could use this. I was browsing through Terror Island a while ago, but I kept getting thrown off by how the navigation buttons were just barely out of view on my screen. Which, on a laptop, meant two-finger scroll...
Sat Dec 15, 2007 8:56 pm UTC
Forum: Coding
Topic: Caps on, Caps off
Replies: 9
Views: 2376

### Re: Caps on, Caps off

This isn't an all-purpose solution, but if you have a browser handy, you can open up a new tab/window and use javascript to effect the changes you want. You can escape embedded quotes if necessary. Both of the following should output the changed sentence to the new area. javascript:'YELLING IS NOT C...
Sat Nov 17, 2007 4:18 pm UTC
Forum: Mathematics
Topic: Using a calculator to calculate the modulus (no mod func)
Replies: 3
Views: 32080

### Re: Using a calculator to calculate the modulus (no mod func)

While (obviously) I'd recommend getting a hold of another calculator, in the meantime you can replicate the modulo function. For some x modulo y, divide x by y, subtract the remaining whole number, and multiply the remaining decimal (should be zero point something) by y. For example, 324 modulo 15: ...
Sat Nov 10, 2007 1:15 am UTC
Forum: Music
Topic: Favorite Chords?
Replies: 85
Views: 9184

### Re: Favorite Chords?

I_Ate_My_Children wrote:(0 2 2 0 3 3)
Pink Floyd fan?

I don't have a favorite chord, but my favorite change by far is the beginning of Deep River Blues:

0 x 6 7 5 7
0 x 5 6 5 6
Mon Oct 08, 2007 9:36 am UTC
Forum: Books
Topic: Worst/Overrated books.
Replies: 753
Views: 272612

### Re: Worst/Overrated books.

Well, to sidetrack the thread a bit, I have a couple (kinda) short defenses for books people have mentioned. The Art of War I think the translation is key, like the poster mentioned. The first copy I read had historical anecdotes and stories interwoven with the text, flowed beautifully and was at le...
Sat Sep 15, 2007 11:37 pm UTC
Forum: Coding
Topic: The name of the in-page popups
Replies: 4
Views: 1602

### Re: Tooltip?

... you know how the high-up business types are. They see something shiny, and HAVE TO HAVE IT. Cracked me up, it's far too true. Also, sorry about the condescending post I made. Coupled with past frustrations getting Itemstats to work, I tend to slip into Ã¼berformal mode when I think I know somet...
Fri Sep 14, 2007 4:10 pm UTC
Forum: Coding
Topic: The name of the in-page popups
Replies: 4
Views: 1602

### Tooltip?

While I'm not sure if this is specific enough to your example, generally speaking I've heard that effect referred to as a tooltip . Searching for "HTML tooltip" or even "javascript tooltip" on Google might be a good place to start, though I'd caution against leaping into javascri...
Thu Jun 21, 2007 3:11 am UTC
Forum: Logic Puzzles
Topic: Funny Farm
Replies: 48
Views: 11199
Onward and upward.
Edit: slightly better.

very long link gone
Wed Jun 20, 2007 11:49 pm UTC
Forum: Logic Puzzles
Topic: Funny Farm
Replies: 48
Views: 11199
Merged, just made a little progress.

very long link gone
Fri Jun 15, 2007 5:06 am UTC
Forum: Mathematics
Topic: Favorite math jokes
Replies: 1452
Views: 480703
A wholly derivative (and terrible) joke: A large hotel is packed full of engineers, mathematicians and physicists in preparation for a conference. The night before the conference, a mathematician awakes to find his desk aflame and the room filling with smoke. He grabs his blanket to smother the flam...
Fri Jun 01, 2007 5:02 am UTC
Forum: Mathematics
Topic: Overcomplication
Replies: 5
Views: 2561
Furthermore, you're not even using lemma 1.2, so why state and prove it? I think I used it briefly in the proof of lemma 1.3, but as you and Woxor and Yakk have all pointed out, using the properties of rings or fields would be a much better method than modulo case-bashing. And, of course, you hit t...
Thu May 31, 2007 4:01 am UTC
Forum: Mathematics
Topic: Overcomplication
Replies: 5
Views: 2561

### Overcomplication

Recently, I ran into a minor issue concerning whether an equation had a unique solution, if both variables involved were constrained to the set of naturals. My attempt at a proof is below, which hopefully alleviates some homework concerns, though it's somewhat lengthy â€” wherein lies the problem. T...
Fri May 11, 2007 7:27 am UTC
Forum: Logic Puzzles
Topic: 3n+1
Replies: 89
Views: 25939
Is this the FIRST time it is divisible by 4? Sorry to necropost, I just wanted to answer this question. As far as I can tell, it is definitely the first time it is divisible by four. Below is my attempt at explaining/proving the logic behind this assertion, which may be difficult to follow, so I ap...
Wed Apr 25, 2007 1:08 am UTC
Forum: Logic Puzzles
Topic: 3n+1
Replies: 89
Views: 25939
Sorry, yeah, corrected my statement. Hopefully the edited post makes sense, because the first one definitely didn't.
Wed Apr 25, 2007 12:54 am UTC
Forum: Logic Puzzles
Topic: 3n+1
Replies: 89
Views: 25939
If it's of use to anybody, the number of iterations before any odd number n becomes divisible by four is equal to the number of factors of two in (n+1)^2, minus one. For example, when n=23, (23+1)^2 = 576. According to this handy applet , the prime factorization of 576 is (2^6*3^2), which means that...
Thu Apr 12, 2007 2:37 pm UTC
Forum: Logic Puzzles
Topic: Comment blocks
Replies: 26
Views: 8256
While I'm fairly convinced that comment-style switching (as described) isn't possible for more than two segments of code, I don't have time right now to write it up. As it is, the margins are too small. Anyway, the two-block switch can be semantically fixed by changing the last /* to //, like this: ...
Tue Apr 10, 2007 11:28 pm UTC
Forum: Logic Puzzles
Topic: Comment blocks
Replies: 26
Views: 8256
GCC will actually throw a warning if you have a /* inside of a comment block, like (/* /* */ */) and warnings as errors is your friend. D'oh, sorry, not a C programmer, but definitely a good thing to keep in mind. Out of curiosity, does the compiler throw warnings for all comment-like embeds (such ...
Tue Apr 10, 2007 10:32 pm UTC
Forum: Logic Puzzles
Topic: Comment blocks
Replies: 26
Views: 8256
Two multi-line blocks (I think):

Code: Select all

`//*no raptors/*/lotsa raptors/* */`

Edit: much simplified.
Tue Apr 10, 2007 9:36 pm UTC
Forum: Logic Puzzles
Topic: Comment blocks
Replies: 26
Views: 8256
Although my programming experience is almost nil, I think the code below might work. Unfortunately, it occupies three (or more) lines instead of two, and requires the second segment of code to be compressed to fit on one line. Add/remove the first character to toggle between segments. //* codey wode...
Thu Apr 05, 2007 1:02 pm UTC
Forum: General
Topic: Question for people who know about classical music
Replies: 86
Views: 11863
It's called Us and Them. I have it somewhere at home. I will now find it and share it with the fora as soon as I can. Sorry to jump into this conversation headfirst, but I've got that handy (MP3 or AAC), if anyone wants it. My favorite cover is personally the Philharmonic's take on Time, which is b...
Sun Mar 11, 2007 1:32 pm UTC
Forum: Logic Puzzles
Topic: Prime Ponderings
Replies: 23
Views: 5111
Sorry for the long delay in getting it typed, but here was my attempt at a proof. Please forgive my terrible misuse of established terminology, I suck at this stuff. Suppose that for every odd prime p , there is only one possible solution set for x^2 - y^2 = p, given that x>y and xy>0. Then consider...
Wed Mar 07, 2007 10:52 pm UTC
Forum: Logic Puzzles
Topic: Prime Ponderings
Replies: 23
Views: 5111
Holy cow, my proof was definitely unnecessarily complex. Sorry to have bothered you guys with this; I think I got mathematical tunnel vision or something, because the way I was going about it was about two pages long.

D'oh and thanks for the simplification.
Wed Mar 07, 2007 7:06 pm UTC
Forum: Logic Puzzles
Topic: Prime Ponderings
Replies: 23
Views: 5111
I am not gonna provide a proof because this maybe homework. Though I don't have a proof just a first instinct. Haha, yeah, I realize this sounds like homework, especially in the phrasing of the question. It actually isn't, I just don't have the mathematical knowledge to tackle more complex problems...
Wed Mar 07, 2007 6:44 pm UTC
Forum: Logic Puzzles
Topic: Prime Ponderings
Replies: 23
Views: 5111

### Prime Ponderings

This is a problem that I've been thinking about for a while now, and I was wondering what all you math whizzes would make of it. I think I've reached a solution, but I get the feeling that it's either wrong or remarkably inelegant. So if someone gets the urge, any thoughts on this would be awesome. ...

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