Lec 15 | MIT 18.02 Multivariable Calculus, Fall 2007

[melisantika]

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[Onepissite]

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[Ondelendo]

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[bebeheuy]

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[willamricard]

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[imegatrone]

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[anakmudajaman]

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[muslim86mus]

This vid isn't about Partial Differential Eqns!!

It's all about Partial Derivatives...

They 2 are not even that closely related...

[mariomaruf]

@muslim86mus It mentions it once because that was on the schedule. And partial derivatives aren't related to partial differential equations? Then I guess variables aren't related to algebraic equations.

[muslim86mus]

@mariomaruf

Yeah, PDF is mentioned in the video.

But the description above doesn't match the main lecture, get it?

If you can clearly see, I actually typed "not even that closely related" instead of "not related"...

No offense but your analogy to algebraic eqns is ridiculous, implying that you don't know much about their differences! ;(

[mariomaruf]

@muslim86mus Look what it says right next to the partial differential equations part. If you were hoping for lectures on PDEs, then this isn't the place. This lecture is a review of the material in the relevant unit.

[muslim86mus]

@mariomaruf

Keep that review to yourself, you're partially right...

Had the lecture been about a review of PDE, the lecturer would've started it with the 3 classifications of DE especially the differences between ODE and PDE. I wasn't lookin' for any PDE lectures, I only came across ths vid whn I wanted to make joke wth my friends.

A person still can learn PDE even if he's just failed Multivariable Calc (Partial Derv in it).... but he'll find it hard if he already fails to understand ODE.

[mariomaruf]

@muslim86mus Are partial derivatives related to PDEs in the same way that derivatives are related to ODEs? I know about a semester's worth about ODEs, and so I assumed that the relation between derivatives and ODEs was the same as with partial derivatives and PDEs. I don't really know anything about PDEs though.

[muslim86mus]

@mariomaruf Well, you should've mentioned that you didn't really know earlier....

Yes, they're related only by definition.

In fact, not only is a GS of a linear PDE often difficult to obtain, it also is usually not all tht useful in applications.

Simply put, we're more interested in finding PS of PDEs that generally appear in mathematical physics involving boundary-value (BV) problems as compared to ODEs.

Oh yeah, Orthogonal Expansions & Fourier series are indeed prerequisite topics for PDEs...

[MatrixOfDynamism]

why is Q not on the other side, if we move down (South) from where dh/dx is 0 than also h which decrease  right? I mean dh/dy < 0 for both points right? why only for the upper one?

[stoopidmonkeyful]

Love those sliding elevated MIT blackboards!

[hmpcon]

Lol @ 41:15

[geirart]

I love math

[tj1990]

20,000 views...2 comments....interesting...

[grubby314]

@tj1990 INDEED

[velhovaqueiro]

haha, i like this guy

[ballastatus510]

lol at 15:00