Recommend me a calculus of variation book

[junhyeok]

Hi!
I have some trobles while studying the lagrange mechanics chapter of Marion's Classical Mechanics.
There are some variation techniques in that book, but I only studied calculus and elementary linear algebra in my freshman year. I can't understand how partial derivation and delta notation works. Therefore I want to study more about the variation techniques.
Can you recommend me a book about calculus of variation for physics?

Sorry for my poor english :x

 

[ShayanJ]

Hi
"Mathematical methods for physicists" by Arfken and Weber has a chapter on this which is pretty good I think.
In case you find the above book difficult to read, you can try "mathematical methods in the physical sciences" by Mary Boas. But its still good to at least take a glance at Arfken's because it usually deepens the understanding after having some first exposure.