How Can I Learn the Basics of the Dirichlet Principle?

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hello

im new member here

i need help in dirichlet principle

if anyone have lectures or any thing about this subject

i don't know anything about dirichlet
i need help from basics to top of his subject pleasezzzzzzz
 
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I know a little about Dirichlet (but only a little I'm afraid!). I know he listed 6 conditions that needed to be fulfilled in order to be able to write a function as a Fourier Series. If you think this will help, or is at all relevant, I'll be happy to list them.
 
yes
its very good if you list these conditions

thnx a lot
 

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