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Difficulty with Lagrange multipliers in Kardar's Statistical Physics book
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[QUOTE="AndreasC, post: 6406339, member: 678215"] [B]Homework Statement:[/B] You are given an entropy function in terms of a probability density function, and you are asked to maximize said entropy function in terms of the density function, under the constraint of constant energy. The details aren't very relevant, what I don't understand is a leap in the mathematics of the solution. [B]Relevant Equations:[/B] . Alright, so I did some progress and then I got stuck. After some time I went to check the solution. Up to some point, it's all well and good: [ATTACH type="full" alt="Στιγμιότυπο οθόνης (51).png"]271133[/ATTACH] I understand everything that is happening up to the point where he takes the partial derivative of S wrt ρ(Γ). I don't understand how he gets the result he does. I imagine it's just a calculus thing that I am failing really bad at right now. Damn book always demanding you to know how to do things >:( [/QUOTE]
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Difficulty with Lagrange multipliers in Kardar's Statistical Physics book
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