Variation of Parameters

Comments · 34

• TH

  @TheHamoodz · 9 years ago

  Came in trying to study for differential equations exam, ended up learning stuff for my circuits exam... Nice!

  60

• BE

  @BentoMontenegro · 9 years ago

  Strang always clear, always simples, always the best!

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• TH

  @TheMehedi007 · 9 years ago

  God bless Dr Gilbert Strang .

  27

• OZ

  @ozzyfromspace · 6 years ago

  Seeing him go from variation of parameters to the convolution of f(T) and the impulse response was soooo satisfying. I’m gonna do this for myself in full, just to enjoy the satisfaction/euphoria that results 😄☺️

  25

• GE

  @georgesadler7830 · 5 years ago

  This professor really wants students to understand differential equations like the back of their hands.

  1

• HO

  @HosRo4161 · 3 years ago

  Thank you, Professor Strang! Thank you!

  1

• DA

  @DarkMonolth · 9 years ago

  I learned this method completely differently using multiple determinants, it comes out a lot easier in my opinion.

  7

• MR

  @mrvzhao · 8 years ago

  For full derivation of the two equations at <a href="https://www.youtube.com/watch?v=0f15AVSQ770&amp;t=190">3:10</a>, &nbsp;check out this video: <a href="https://www.youtube.com/watch?v=IYKULUq6YPQ">https://www.youtube.com/watch?v=IYKULUq6YPQ</a>

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• AL

  @AliceIleneSum · 8 years ago (edited)

  For those people who don&apos;t know how the first two equations of rule come from, plz watch this old MIT video :<a href="https://www.youtube.com/watch?v=IYKULUq6YPQ">https://www.youtube.com/watch?v=IYKULUq6YPQ</a>

  2

• LI

  @lilibethcruz3284 · 9 years ago

  thanks!!!! This lecture really helped!

  7

• WS

  @wsilva1051 · 5 years ago (edited)

  Nice presentation, Dr Strang. It couldn&apos;t be nicer. I just felt curious about the lower limit of integration set to zero. Was that arbitrary? I know it fits perfectly ok, especially when thinking physically in terms of causality of the Green&apos;s function and all that stuff, but I couldn&apos;t find any good reason for that choice if did not know in advance that a Green&apos;s function was going to shows up in the end. Could someone help me clarify this?

  2

• DE

  @debjyotichattopadhyay6679 · 7 years ago

  i wish my school teacher to see this video

  2