Lagrange multipliers

A lecture discussing Lagrange multipliers: the method and why it works. Plenty of examples are presented to illustrate the ideas.

[mattyboy]

Absolute boss of a mathematician and comedian; best pronunciation of "Lagrange"

[efeeyuboglu]

This video was extremely helpful! thank you ! Our teacher taught us a different way which is harder but now i guess im the only one who knows a better way to do it in the whole class! thanks again! keep up

[DrChrisTisdell]

@fakerneverno One of the assumptions of the OGT is that $f$ has a local max/min, whereas to show that the gradient is perp to a surface there is not necessarily such an assumption on $f$. Great question!

[DrChrisTisdell]

@fakerneverno The OGT is definitely needed for the proof of the method of Lagrange multipliers. It's used to show that $f$ (the function that you want to max/min) has a gradient that is perp to the surface g=0 (the constraint function) at max/min points. Of course, we also know that grad g is also perp to the surface g=0.

[MrPeeepe]

Thanks for the proof. You're a great teacher. Thanks for your videos!

[khalidkasab]

An introduction to optimization by Edwin K. P shong.
Sir, Kindly teach chapter 19 till langrange theorem for functions of two variables. Please give this favour. I'll be much thankful.

[gattabat]

Sweet, life saver of unsw courses I finally have hope I won't fail


For the 'proof' at the end, why does it work if g isnt a flat plane? Or are we forcing it to be flat?

[denswam]

Thanks man! Am doing a Computational Models exam tomorrow and didn't kno what was happening till i saw your lectures on Fourier and Taylor Polynomials #Kenya

[DrChrisTisdell]

I just enjoy saying his name with a French accent. If you watch a few more of my videos then you'll see I do all kinds of different accents - the students really like it.

[DrChrisTisdell]

You are welcome. Best wishes to all in beautiful Malaysia.

[overuchan]

Thanks Chris! Helping me review for 2011 test tomorrow :D

[PradeepSingh-bnxk]

dr chris tisdell !! awesome professor
thanks

[cvgray]

Do you have any videos on the Kuhn-Tucker conditions?

[DrChrisTisdell]

You are welcome. Sorry for the late reply.

[Rody]

Good Teacher....amazing....but could you please uploaded the paper which is in the video.
Thank you so much teacher

[DrChrisTisdell]

I'm sure you have much more than that already! :-)

[matthewlee]

How do you get the distance function at 24:00?

[daffyduck]

if I could only have a 1/100 of your understanding of !

[lasorsat]

You should say it with an Italian accent, in honor of his heritage!❇

[MrGeopap]

you sound like you re making fun of Lagrange each time you call his name.