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February 29th, 2012, 08:06 PM   #1
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Lagrangian Help

My wife is being stubborn and is neglecting to ask for help, so I'm here with sparse information in order to help.

For her non-linear optimization class...
She says she is trying to rewrite the lagrangian as

f(x) *lambda*, *something that looks like the letter C in greek*

If anyone can help or point me in the right direction as to 1) what she is trying to do, 2) where she could find out how to rewrite it, 3) help in general.

P.s. sorry I can't code or do the cool letters/symbols. Thanks!
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February 29th, 2012, 08:14 PM   #2
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Re: Lagrangian Help

These articles may help:

http://en.wikipedia.org/wiki/Lagrange_multiplier

http://mathworld.wolfram.com/LagrangeMultiplier.html

Many others can be found by googling "Lagrange multiplier."
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February 29th, 2012, 08:23 PM   #3
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Re: Lagrangian Help

She gave me another key word through her frustration: it's a "minimization" problem

Thanks for the help.
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March 1st, 2012, 04:27 PM   #4
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Re: Lagrangian Help

If she knows how to maximize f(x), but she needs to minimize it instead, have her maximize the function g(x) = -f(x) instead.
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