Mathematics - Multivariable Calculus - Lecture 17

[Tolan04]

I just like watching lectures of classes I never had to take and classes I had no chance of passing.

[OutlawedSpank]

sometimes, i like watch these lectures to remind me i did a good thing by not choosing maths....

[kaidauda]

good lecture though

[kaidauda]

donot say its a European way, it was a blunder accept it.

[skit6424]

hi, plz provide me with the solution to the following question, i need urgently.

Q: ). Consider the vector field U (r) given in spherical coordinates by U (r)= r ̂ ( r^2  cos⁡θ+ 3 sin∅ ) Transform this vector field from spherical to rectangular coordinates.

where r^2 inside the paranthesis means square of r and the r^ outside the paranthesis means unit vector r. plz anyone send me its solution with in one day. plz.

my email id is following

superiorboy16@yahoo.com

[CodyBolen]

I'm curled into the fetal position, calculus you are so scary and I hate you.

[sarahlewiis]

because you know, we're just gonna use this in our everyday lives right?:/

[danielairy]

he means the comming thursday :)

[comecra85]

this lecture is for some reason too difficult to download.

[Frehmicha15el]

math is retarted.

[PriestRSC]

@Frehmicha15el no, just the people like you are retarded, you spelled it wrong too.

[amanda112358]

These lectures would be greatly improved if the person recording the lectures paid closer attention, and focused on the chalkboard that the lecturer is using. There are many places in this video playlist (eg. 20:00 to 23:00 minutes into this video) where it appears that the recording device is not focused on the lecture content. This makes it difficult to follow the video and harder to learn the content. of the course.

[websuspect]

Hey while your teaching at Berkley why dont you learn proper English!

[websuspect]

Im glad I no go to this school. This guy sounds like he just escaped from the Agalot. ( Israeli Mall Kiosk )

[kstahmer]

Review for second midterm exam. The next lecture is Lecture 22.

[SeexyyAmbeer]

any nice guys out there who want to chat and talk on the phone

[caesiume]

It's interesting to see how Colleges in other countries work.

[berrypossum]

Look at the bs ya go thru in this overpriced crock ripoff. still hasnt taught one lesson still talking rules... people should be ashamed. Pass the knowledge, please

[dizzygfunk]

how can you expect people to learn in such a large room?

[theasianedward]

im in a classroom of 500 ppl for bio,

and i learn fine.

UNC REPRESENT

[DeraJa]

@theasianedward is it bio 101?

[theasianedward]

yep

[erl4nd0]

ok?

[underground24020]

Don't let his intellect fool you...Ed Frenkel is a Master Cocksman...

[1bigstudmuffin]

im dropping loads

[swampy303]

To whoever this professor is, THANK YOU. This lecture is worth so much to us and the knowledge he teaches is so hard to gain through enrollment.

[mrblond2]

Prof. Frenkel. That was my Math 53 prof 10 years ago. He's Russian, looks like Michael J Fox, and likes to talk about the Vodka technique (I mean corkscrew).

Good prof.

[applecounty]

Only the best for Berkeley.

[almuzcallo]

i was dario's studet jaja :P

[fragan01]

Cool.

[gavnastyyy]

WHY AM I WATCHING THIS!?

[anafredd]

lol, im thinking the exact same thing right now...

[smhussain62]

Haha. If only you knew.

Without knocking the actual subject matter of painting and music, I've personally found that a higher percentage of painters and musicians are 'intellectually challenged' versus mathematicians. I don't know of any study which confirms or refutes this experience but it really has been my experience.

Sadly, you've just added a little bit more to that experience.

[faraz1729]

"Mathematics is just a matter of sitting through this and remembering it. Go and do something creative ..."

This may be the most wrong and most ignorant about a topic anyone has ever been. Bravo.

[TheLivirus]

@faraz1729 My professor keeps reminding us that math is learned through by HAND, not through the eyes. Also I'd say math is like 90% memory, the rest is logic.

[J0EH3AD]

@TheLivirus If you want to work in mathematical research, only pure creativity can push you forward. Maths is the only science where progress is pure creativity. First you develop tools (like you learn how to paint) and then you can do what your capabilites allow you to do. Math 90% memory - the biggest nonsense I ever heard.

[TheFoxyBelle]

Hottie w/ an accent!

[PoopShitMario]

Is he Eastern European? I heard they make great mathematicians. :p

[clayderman18]

He's Greek, and no, we here in Eastern Europe don't make great mathematicians... just some of us... :)

[ilikecoke]

Berkley allows cheat sheet? What? My school isn't all that but my professor never allows it. That's just wrong...

[dragonstorm83]

It's not really a cheat sheet. I graduated from Berkeley, I know. You get one page to write everything that you "think" you will need to know for the test and you bring it to class. The funny thing is that writing the information on the sheet helps you remember that information, so you actually never really use the sheet. Plus, you don't have time to fumble through a page of formulas and proofs during the exam. They let us because they know it's bullshit.

[ilikecoke]

Yeah, but still they at least get a sheet of something. Btw, is that your body?

[mrblond2]

Trust me...Berkeley is hardcore. As mentioned, the cheat sheet gives you a psychological reason to study and write down what is important. Makes you think you are gaining an edge. The only edge you gain is the fact that you write down the correct information which helps your recall of that information. If you need to look at your sheet for each question you will fail.

[ilikecoke]

okay mr. blond LOL

[swampy303]

Agreed, Berkeley is top ranking for a reason. You have to go in there KNOWING the information. Doubts have to be absolutely minimal.

[nacho862]

i always figured that the cheat sheet was there primarily as a resource for theorems and equations during the test. multivariable calculus requires a good amount of memorization, and the sheet lessens that burden, but the actual thinking and problem solving part is needed to do well on the test.

[freecellfreaky]

frenkel is so sexy

[TheLonelyImmortal]

Yes- "Next thursday" has always confused me.

[vinoyaceitecarlitos]

my to hahahaha

[alex1314159]

nice stuff Berkley

[mikerules999]

i would love if all schools recorded their important lectures like Berkley does, its so helpful

[deceiver123m]

@mikerules999 yah i found it very cool. IF ANYONE KNOWS OF WHERE TO GET GOOD UNIVERSITY LECTURES- OF ANY TYPE PLEASE SHARE WHERE TO GO FOR THEM. THANKS

[smhussain62]

Haha. I think I know what you mean but I quite enjoyed it because I went into a nostalgic process and snapped back to my own past.

Yeah... sure it's boring for everyone else but...

Btw, the content of the lecture is really, really basic but for some reason it isn't taught to teenagers in any country (as far as I'm aware) which is a big shame.

[mrblond2]

Only the most advanced students would understand this material before college (most of the students in this class are 18-20, so they are mainly teenagers). Even then, those students likely already have an intuitive understanding of this material. For the rest of us, true understanding of calculus, which is required to do well in this course, is not had until after going through am intensive calculus course with an emphasis on proofs.

I think it can be done with advanced 16-17 year olds.

[smhussain62]

Yeah. I was 18 when I was learning this but I would have preferred to have discovered these ideas much younger. But of course I didn't know they existed. None of the libraries I had access to were suitably equipped. I would've loved this video and devoted many hours to making sense of the bits which would've gone over my head at first.

I'm certain this video is being watch by some wide-eyed kid who is doing just that.

[dorns606]

ya im a wide-eyed kid doing that lol!

[crisronthegreat]

You must be reffering to me,I'm 15 and I have understood like 75% of the first 6 lectures and it seems really fun.I would like to say thank's to UC Berkeley for putting up these videos.

[mikerules999]

it is your problem, the video is fine