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#276 Re: Help Me ! » Is there such a function? » 2014-11-02 05:01:53
Still the same answer. The derivatives all need to be continuous.
Just found this:http://en.wikipedia.org/wiki/Bump_function
#277 Re: Help Me ! » Is there such a function? » 2014-11-02 02:05:18
Because it wouldn't be differentiable.
#278 Re: Help Me ! » Is there such a function? » 2014-11-01 22:58:52
Thеy did not define it as
on the whole , but rather on (0,1). It's a piecewise defined function.
#279 Re: Help Me ! » Is there such a function? » 2014-11-01 13:55:35
How? Why do you think it's possible?
#280 Re: Help Me ! » Is there such a function? » 2014-11-01 13:48:13
Yes, it is defined that way.
#281 Re: Help Me ! » Is there such a function? » 2014-11-01 13:46:08
It's 0 there.
#282 Re: Help Me ! » Is there such a function? » 2014-11-01 13:34:12
I imagine they mean
#283 Re: Help Me ! » Is there such a function? » 2014-11-01 13:27:17
It works, but I don't know how they got it.
#284 Re: Help Me ! » Is there such a function? » 2014-11-01 13:21:42
Hm, interesting. So how does one go about finding such a function?
#285 Re: Help Me ! » Is there such a function? » 2014-11-01 13:07:59
What is it?
#286 Help Me ! » Is there such a function? » 2014-11-01 13:01:24
- anonimnystefy
- Replies: 87
Is there an infinitely differentiable function which is positive on (0,1) and 0 elsewhere?
#287 Re: Jokes » Experimental Mathematics Troll » 2014-10-29 09:18:02
From your sentence it would seem as if though GiB was also a mod.
#288 Re: Help Me ! » Formal Limits » 2014-10-29 09:12:50
How can you show something that is not correct?
#289 Re: Help Me ! » Tautologies » 2014-10-27 03:00:22
Well, if either of you are not able to say that, there will be some sort of error when trying to run that loop another time.
Also, I admire your ability to gather new solutions by the millisecond. 
#290 Re: Help Me ! » Tautologies » 2014-10-26 07:18:02
It will repeat only as long as both of you are actually able to say that.
#291 Re: Help Me ! » Tautologies » 2014-10-25 22:51:25
Hate to say it, but that algorithm can run only a finite number of times.
#292 Re: Help Me ! » algebra » 2014-10-25 22:41:17
wz not equal to -1. He used LaTeX without the tags.
#293 Re: Jokes » Experimental Mathematics Troll » 2014-10-25 22:18:09
I beleive it's closed for quite a while now. It was shown to be undecidable.
#294 Re: Help Me ! » Tautologies » 2014-10-25 22:16:00
You're welcome.
You should not use goto. A while loop should suffice.
And, yes, b-a is correct.
#295 Re: Jokes » Experimental Mathematics Troll » 2014-10-25 20:47:50
You should try to know if there is a set whose cardinality is strictly between that of intehers and real numbers
That is no longer an open problem.
You should try trolling them with the Riemann hypothesis. It's at least a bit more productive.
#296 Re: Help Me ! » Tautologies » 2014-10-25 20:45:24
Reducing to DNF would be a sufficient proof, but it's weird because the question clearly asks for an example of when it is false.
#297 Re: Jokes » Experimental Mathematics Troll » 2014-10-25 20:38:51
What will I have done to make me famous?
#298 Re: Jokes » Experimental Mathematics Troll » 2014-10-25 11:32:11
Famous for what?
#299 Re: Jokes » Experimental Mathematics Troll » 2014-10-25 10:52:29
It puts the "mental" in "experimental".
#300 Re: Help Me ! » Tautologies » 2014-10-25 10:48:12
What I meant is exactly that. They just wanted to say, "if you are proving this to be a tautology, we discourage you from using tables to do so."