Search found 5372 matches

Mon Jan 07, 2008 4:55 am UTC
Forum: Mathematics
Replies: 367
Views: 84491

I meant worst as in "why would that be an indeterminate form?"

The answer, obviously is because the log is indeterminate. ln(1^inf)=inf*ln(1)=inf*0.
Mon Jan 07, 2008 4:52 am UTC
Forum: Science
Topic: Time reversal and second law of thermodynamics
Replies: 29
Views: 3904

Re: Time reversal and second law of thermodynamics

ArmonSore wrote:Are you implying that a gas made out of antimatter (let's say an anti-matter equivalent of H2) would somehow move away from the macrostate with highest multiplicity, rather than towards it?

I think he has a very large misunderstanding of virtual particles.
Fri Jan 04, 2008 4:13 pm UTC
Forum: Science
Topic: Travling the Speed of light with a light
Replies: 20
Views: 2838

Re: Travling the Speed of light with a light

And to keep that statement from unravelling the laws of relativity, you can never travel through that material at the new speed of light, c n . No. See http://en.wikipedia.org/wiki/Cherenkov_radiation for a start. Interesting fact: In the early days of particle accelerators, physicists would put th...
Fri Jan 04, 2008 4:10 pm UTC
Forum: Science
Topic: Help me think up crazy hard SF technology ideas
Replies: 74
Views: 6714

Re: Help me think up crazy hard SF technology ideas

The methods we'll have used however, are complete speculation. If we are still using chemical (or nuclear) rockets, we cannot do interstellar travel. Things are just too far away, espically habitable planets. For those ships traveling at significant percentages of c (even as low as 1%), a tiny bit ...
Fri Jan 04, 2008 3:56 pm UTC
Forum: Mathematics
Topic: Tricky Multivariable Limits
Replies: 11
Views: 1895

Re: Tricky Multivariable Limits

try approaching on the line y=x*parameter. This will let you see if it converges in all directions. It must converge for all values of the paramter.
Fri Jan 04, 2008 1:07 am UTC
Forum: Science
Topic: Help me think up crazy hard SF technology ideas
Replies: 74
Views: 6714

Re: Help me think up crazy hard SF technology ideas

Hmm. -Zero-time communication and travel. We know now that it's theoretically possible for quantum particles to transfer information to each other instantly, but we can't use it for any feasible application. However, extrapolating this knowledge provides instant-transport and communication devices ...
Fri Jan 04, 2008 12:23 am UTC
Forum: Mathematics
Replies: 367
Views: 84491

When I was in calc, the worst indeterminate form was 1^infinity.
Thu Jan 03, 2008 11:40 pm UTC
Forum: Mathematics
Topic: I think I like maths...
Replies: 28
Views: 2843

Re: I think I like maths...

Quintopia my Galois theory prof told us a wonderful story. He named the student too, but I couldn't remember. Student walks into class late, sees a few problems on the board, takes them down as homework. Shows up at the prof's office the next week and says, sorry sir, but I could only solve one of ...
Mon Dec 24, 2007 7:22 am UTC
Forum: Mathematics
Topic: Favorite math jokes
Replies: 1452
Views: 489825

Re:

Anything that has the mathematician exclaiming "there is a solution!" and proceeding to stop caring entirely about the problem. One of my chemistry professors told us a (true) story. Back when he was doing research, when he was young, he was stumped by some nasty terrible integral that he...
Mon Dec 24, 2007 7:05 am UTC
Forum: Mathematics
Topic: How do you end your proofs? QED, box, ...
Replies: 107
Views: 21566

Re: How do you end your proofs? QED, box, ...

I use the 3 dots in a triangle. Does nobody else use it? That generally (and by "generally", I mean, "it does") means 'Therefore'. Yeah but maybe he uses it just before the final line. We're not talking about what you use before the final line. We're talking about the symbold at...
Fri Dec 21, 2007 4:50 am UTC
Forum: Mathematics
Topic: How do you end your proofs? QED, box, ...
Replies: 107
Views: 21566

Re: How do you end your proofs? QED, box, ...

I use the 3 dots in a triangle. Does nobody else use it?
Thu Dec 20, 2007 5:50 am UTC
Forum: Mathematics