I'm new in this area, and I have some trouble understanding the next concepts, I'll be glad if somebody can give a sample definition or some examples of the concept of "Local Lagrangian" and "configuration variables" on sistems with finite-number or freedom degrees. Thanks in advice.
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1Local Lagrangian part has duplicate: http://physics.stackexchange.com/q/95018/ – Mar 16 '17 at 19:44
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It's right to say "Local Lagrangian" are the same that "Local Lagrangian Density"? – Ragnar1204 Mar 16 '17 at 19:47
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Almost always AFAIK, density is implied. – Mar 16 '17 at 19:49
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Configuration space is explained here: http://physics.stackexchange.com/q/185612/2451 – Qmechanic Mar 16 '17 at 20:05