## Search found 4888 matches

Sat Nov 04, 2006 1:39 am UTC
Forum: Logic Puzzles
Topic: 1=2
Replies: 9
Views: 5189
I've got a "higher-math" version of this: x^2 = x*x = x + x + x + ... + x [x terms] d(x^2)/dx = 2x d(x^2)/dx = d(x + x + ... + x)/dx = 1 + 1 + 1 + ... + 1 = x 2x = x So what this says is that either 2 = 1 (if x != 0) or that one of the above equalities only holds for x = 0. But all of the ...
Sat Nov 04, 2006 1:33 am UTC
Forum: Logic Puzzles
Topic: Puzzle for anyone except for eve [SOLUTION]
Replies: 58
Views: 20894
This is a good puzzle! I like! It's almost a crypto protocol problem, but there's a semi-subtle difference that totally change the dynamics. Specifically, Eve can't both intercept (and keep) one of the packages and pass it on to Bob at the same time. That makes all the difference, and is why this is...
Fri Nov 03, 2006 7:12 pm UTC
Topic: 0179: "E to the Pi times I"
Replies: 161
Views: 54422
SpitValve wrote:Except when [i,j,k,l] are all different roots of -1... and ij=k, jk=l, li=j. And that's everything I know about quaternions.

ooh and you use them to rotate things.

And they can be used to make pretty fractals
Fri Nov 03, 2006 6:02 am UTC
Forum: General
Topic: Dvorak
Replies: 69
Views: 21370
This thread has inspired me to retry something I'd been meaning to do for a while, which is turn my capslock into a backspace. I know some people like to make it "Control", because in some keyboards that key was a Control key, but it's Backspace that sends my hands flying, not Control. La...
Fri Nov 03, 2006 5:49 am UTC
Forum: General
Topic: I'm so nerdy that I ...
Replies: 1377
Views: 202230
I learned Dvorak. That's quite cool, actually. Was it hard to make the switchover? In retrospect, was it worth the effort? I made the switch too. I think it is worth it, though it's not the easiest thing in the world. The biggest problem is that I now go to other computers that I don't have control...
Fri Oct 27, 2006 9:13 am UTC
Topic: 0175: "Automatic Doors"
Replies: 65
Views: 31234
I just thought of another funny story, this one from a magazine article by Douglas Adams, reprinted in A Salmon of Doubt. Amusingly enough, it has nothing to do with H2G2. So he was writing about a trip he took to Australia or New Zealand or some place down there, and he was staying at a "resor...
Wed Oct 25, 2006 2:50 pm UTC