FWIW, I was the one who sifted the Trayvon martin videos here, so at least I'm contributing to both sides. I guess I'm surprised that Sifters would be disinclined to accept a mathematical fact about a number. That's like just "disagreeing" with relativity because you can't picture it in your mind even though it's been proven to hold on all but the tiniest microscopic levels. [edit: I mean relativity, not 0.999..., which holds perfectly always.]>> ^VoodooV:

do a google search. It's been argued forever. Only thing it proves is how far we'll go to argue ridiculous things and the fucked up priorities of humanity.
we'll argue .999... for forever (or infinitely...zing!) but try and solve things like why kids like Trayvonn Martin still get senselessly shot or try and solve how we can take care all of our citizens regardless of income level. Ehh, we'll get around to it sometime.
It reveals just how truly absurd this shit is.

<sigh> It appears I'm wrong about intelligence on the Sift.

0.999... isn't infinitely close to 1. It is an identity of 1. It IS 1. They are exactly the same thing, not just really close, but exactly the same.

@VoodooV: You should have bet me a Sift mug or something. I would have paid out.>> ^entr0py:

Does that mean we can dispense with > and < completely and simply use >= and <= for any inequality? That would make my life easier. After all, infinitely close is close enough.

I didn't know this topic caused fights. This is my first time seeing it on the internet. I happened to figure it out by myself a few months ago, and ran it by a nerdy friend who said they are synonymous. So hopefully others haven't seen it either and will enjoy yet another one of Vi Hart's amazing videos.

Besides, this is the Sift. People here are a bit more open-minded to new concepts and changing their understanding of things than in the average internet joint. I predict a 9.999...sion-free sift (your comment excepted). >> ^VoodooV:

not this crap again. You do know this proves nothing other than how easy it is to start an internet fight.

>> ^Payback:

Anyone else beginning to think all this exposure is going to her head? She was WAY cuter sounding before. Now she's kinda arrogant.


i agree. plus during this one she was clearly on drugs :-D

>> ^Payback:

Anyone else beginning to think all this exposure is going to her head? She was WAY cuter sounding before. Now she's kinda arrogant.
I'm not getting that at all. I think she sounds like she's having fun.

Your video, Vi Hart introduces the amazing fractal number Wau. Wow., has made it into the Top 15 New Videos listing. Congratulations on your achievement. For your contribution you have been awarded 1 Power Point.

Tags for this video have been changed from 'vihart, math, doodle, angle' to 'vi hart, math, doodle, angle' - edited by hpqp

Thanks for the quality.

In reply to this comment by hpqp:
Vi Hart is *quality as usual.

Vi Hart is *quality as usual.

Tags for this video have been changed from 'maths, doodling, doodles, triangle, party, talks, vihart' to 'maths, doodling, doodles, triangle, party, talks, vi hart' - edited by bareboards2

Anyone interested in the copyright claim can check out Michael Blake's post on the subject here: http://youtu.be/9pOd-8AZC-k
And Vi Hart (of Doodling In Math Class fame) weighs in here: http://youtu.be/XJtLSLCJKHE

>> ^grinter:

>> ^charliem:
So what hes saying is that our ear does a physical Fourier transform on the auditory signals its receiving.......cool!

Well, yes! The tonotopic mapping of the cochlea is kindof like that. When you start considering all of the other signal processing 'tricks' the auditory system uses (frequency dependent filtering, neural integration on spacial and temporal scales, otoacoustic emissions, etc) it gets way cooler! I just wish I could find an animation for those.


not sure about animation, but vihart's video goes into more detail on this

http://videosift.com/video/Vi-Hart-What-is-up-with-Noises

it makes for a good follow-up

Seems legit to me. Can I put pure math videos in there? Vi Hart and others?

Thanks for the quality

In reply to this comment by berticus:
*quality

I wish more people understood the incredible complexity and beauty of sensation and perception.

Thanks for the promote

In reply to this comment by hpqp:
This is so full of awesome knowledge, and presented by the beautiful voice and art skills of geek queen Vi Hart to boot!

*promote!