## Search found 8 matches

Wed Feb 22, 2012 4:51 am UTC
Forum: Mathematics
Topic: Nonstandard proofs for simple theorems
Replies: 34
Views: 7014

### Re: Nonstandard proofs for simple theorems

tomtom2357 wrote:This is possibly a circular proof, because fermat's last theorem could rely on this

It almost certainly does not. Though I'm pretty sure it uses the fact that the integers are integrally closed, which immediately implies nth roots of 2 are irrational.
Fri Nov 27, 2009 7:28 am UTC
Topic: 0668: "Pandora"
Replies: 93
Views: 30574

### Re: "Pandora" Discussion

I don't understand this one. I think I'm having problems with the labels. To me this looks like there are two sets, one is labeled "What Pandora plays" and the other isn't labeled. The intersection of the two sets is labeled "What Pandora plays if anyone is around". Then it looks...
Thu Dec 04, 2008 7:28 am UTC
Forum: Mathematics
Topic: ε / δ limits question
Replies: 4
Views: 1086

### Re: ε / δ limits question

delta = min { 1, epsilon/5 } works just fine

given eps. > 0 choose delta = min {1, epsilon/5}
|x - 2| < delta =>|f(x) - 4| = |x^2 - 4|
= |(x-2)(x+2)|
=|x-2| |x+2|
<= 1 * |x+2|
< epsilon/5

qed
Sun Nov 02, 2008 11:21 pm UTC
Forum: Mathematics
Topic: How to state continuity for some odd functions
Replies: 12
Views: 1582

### Re: How to state continuity for some odd functions

Are you taking the same math class as I am?

Edit, oh and f(x) = [x] is continuous on all intervals (a, b) where a, b are integers and a + 1 = b
Thu Oct 02, 2008 1:45 am UTC
Topic: 0483: "Fiction Rule of Thumb"
Replies: 305
Views: 62057

### Re: "Fiction Rule of Thumb" Discussion

Interesting that Anathem is singled out. For anyone who's read/is reading it, it obviously has a lot of made-up words, but that's kind of normal for Neal Stephenson (aside from Baroque Cycle/Cryptonomicon). And if you've read, say Diamond Age , you'll realize that the fact that even some of the term...
Fri May 16, 2008 4:18 am UTC
Topic: 0424: "Security Holes"
Replies: 88
Views: 32100

### Re: "Security Holes" discussion

My question is: who's the guy on the computer? And what kind of computer is that?

Is he God and is he using God's computer? That's pretty chill.
Tue May 13, 2008 2:11 am UTC
Topic: 0422: "A Better Idea"
Replies: 111
Views: 19175

### Re: "A Better Idea" discussion

This is interesting because my senior prom is happening in less than three weeks and I have to make exactly this decision. Well, not exactly . It wouldn't be a formal LAN. It's neat because I have friends who are holding a LAN but I also have like 8 different girls I could take to the prom. It's all...
Thu Nov 01, 2007 1:17 am UTC
Forum: General