One Geometry

[yellowlght]

If you only knew how tough Ricci equations are even for the fully initiated mathematicians u wouldn't be rapping like that - Perelman is a genius as are his colleagues at the institute were he works. Not even the best mathematicians in the US tackle & solve the problems these Russians do -

[nightowl8936]

come on man ... topology, one of the most amazing and fascinating of the pure math subjects ... combined with black assed crack baby music? please don't do this again ... i can't stay for this ... this is is painful ... my ears are bleeding.

I doubt any black person on the planet will ever contribute to the pure maths, they are too god damnably stupid.

[GuidoSenden]

That is just amazing.

[Kingportable]

I think now that you've passed the hype of filming and writing this, you feel like a fool =)

[ybaol1]

what the hell ,sucks,you bitch!

[Headkiller]

what does he mean with there is no topology?

[mathrapper]

@Headkiller I mean that if every loop contracts it is the simplest manifold, which is the sphere. Informally, because it is the simplest shape, I say it has no topology.

[boobah1067]

I have a question: entropy comes from taking these point-spheres of Poincare-Perelman and turning them into a true zero, not anymore a point still existing as a mini sphere (point)?

[mathrapper]

@boobah1067 Here is my best shot at an answer, with the caveat that you are going beyond my comfort zone. The Ricci curvature equation can be thought very loosely as changing the geometry of the shape slowly the way blowing up a balloon changes its geometry. Very, very loosely, the appearance of singularities corresponds to a region being stretched so much it bursts. If this happens only finitely many times, you can finish the proof.

[mathrapper]

@boobah1067 continuing! Because you can reconstruct the original manifold. Entropy just allows you to control that. It increases (or decreases?) during the blowing up and the replacing, and I believe you can show if it is big (small?) enough these singularities cannot arise, so you get finitely many. Perelman also controls what kind of singularities can occur and how.

[boobah1067]

@mathrapper Hm. Thanks! So the idea is a) that any "ring" of a surface is, of course, its own boundary (mini sphere). But it has to "pop", as in, express space in a specific way and "end" to be considered a finite bound, and a "singularity", and if so, it is not a replicative sphere of the original, but rather is "countable" and "dies" at some stage. If so, then it demonstrates something about the original sphere's limit per segment?

[boobah1067]

Never mind -- I see you DID put them up. Fabulous.

[boobah1067]

Fab! Wish the words could be given, too, maybe at end. It's hard to catch all of them with the accent or mike being blurry.

[Tural192]

İ think......if my teachers tell lessons like that...))

[taraschance1]

Too Cool!!!

[4ynep]

16 people got way too bad math grades... :D

[gorginian]

0.o ..............................­........ what?

[pendejadafcc]

freemason?

[TaterGumfries]

Need to get a real rapper to do this. Lyrics are pretty good. Lose the "izzle" and send it to Reggie Watts

youtube dot com slash watch?v=CJQU22Ttpwc

[BearWindAppleyard]

this is funny

[haddockseyes]

Wow . . .how can you not like this! Great job!

[arvindleela]

Griiiiiiiiiiiiiiiiiiiiiiiiiiii­iiiiiiiiiiiiiishaaaaa!!!!!

[chandraiitk]

great!

[poncethegreat169]

this guys got some serious skillz

[Cathode0]

The grasp you have of tone and inflextion is unparalleled!

[xpzwhisper]

awesome (Y)

[Raminber]

Your are better than Snoop man. Cool

[austinr2d]

impressive professor. i like your steelo.

[rynocowboys2003]

so is this guy a real amth teacher

[aiden9003]

rapping teacher ftw =D

[upopads]

I am one of Sawin's students and although I don't know exactly what he is singing about in this video I can attest to the fact that it is hilarious and that he probably knows what he's talking about here. XD He is a very smart guy that made a lot excellent Excel programs for statistics.

[doseryder]

From Grigori Perelman wiki, its said that he declined the Fields Medal. Why? Isn't the Poincares conjecture one of Millenium Prize Problem. Did he turn down the million dollars too?

[luiss77]

According to the rules, the prize will be given two years after the solution to the problem is published in a refereed journal. Since Misha Perelman doesn't have any interest in having his papers published for the time being, the prize can not be given to him.

[blkjedi954]

That was terrifically awesome and brilliantly delivered!! I'm an avid hip hop listener as well as a math afficionado and I was taken a back by the pure poetry in which you were able to explain it. Kudos!!

[msbigg]

U go boy, that was good rap.

[jcmwasagenius]

This is a great rap!! I love the beginning and that legendary photo of Perelman!

[gurukilla2]

rofllll

[feministbabe]

rapping + mathematic proofs = best thing ever

[L1NK666XL1NK666]

Y'see this is why the education system in england is fucked, if we had teachers like this who actualy seem like humans we might learn something.

[sum1unxpected]

yeah, we need real people; like the characters on the BEC.

o^^)(^0^)(^^o

[dlindeman]

Now did you post the explaination without the music? Because i Would like to listen to that. Or you need to put in a follow the bouncing ball feature. Very distracting.

[eyeflow9]

some emcees drop science, but this nigga drops the math. awesome vid.

[brownbug007]

I'm dying !!!

[AndrewMarcell]

I laughed out loud :)

Rock on with your bad self! When your Ricci flow stops at one geometry, one geometry, one geometry... if every loop contracts there's no topology, no topology, no topology!

Good times :)

I still don't get the Poincare conjecture though.

[lazmedina]

I people who try. It is people like this who are willing to make themselves appear ridiculous who have the most impact on our kids.

I all you do is criticize him, what are you doing to make a postive impact on our students?

[system0slaven]

great job

i dont think that you could reach the kids this way

[sgtkr3w5]

lol

[faraz1729]

Haha, that is incredibly awesome! This is genuinely creative and informative.

[Hotmonkeylovin]

Haha!! You're a geek. You're awsome though. Keep it up.

[qbit77]

You are awesome! Thank you...

[greenphantom]

Watching this video has made my day! :)

[pme888]

he's was my teacher this semester...he's really nice but he honestly can't teach to save his soul...

[Chewxy]

I've got an econs Prof who's essentially a genius and wrote a few famous papers. But can't teach. Doesn't negate their genius though.

This man is a genius :D And really nice.

[Islanders1932]

Same thing with me, I had this teacher last semester, the guy has no idea how to teach, he might be really smart, but not a teacher...his classes are also super boring, he never does anything like this during class, believe me don't wish this guy was your teacher, he is boring and a bad teacher

[Islanders1932]

However he is a really nice guy and easy to get along with, just not a great teacher

[htdbtpwt]

dude that's mean. if you don't have anything nice to say, don't say anything at all.

[gecko314]

Go Professor S! Deffinitely need to put the others up.

[Pinkhasov]

DAMN!!!!! i wish this was my tacher HAHAHAHA awsome

[cgc5]

Brilliant. Now I finally understand Perlman's proof. The Teaching Company should market this guy!

[supermathnerdgal156]

Awesome rap and he's awfully cute for a geek!

[dtwine05]

hahaha i wish he was my teacher!!!

y doesn't this have a million veiws??