eman2009 Messages 32 Reaction score 0 Thread starter Oct 15, 2009 #1 how we can explain the differential of lagrangian is a perfect ?L dt
Bob_for_short Messages 1,161 Reaction score 0 Oct 15, 2009 #2 It's dS = Ldt, the action differential. It's just definitions.
eman2009 Messages 32 Reaction score 0 Oct 15, 2009 #3 yes, but how we can prove is it a perfect differential!