The invariance of Lagrange's equations with a given "time" 1. The problem statement, all variables and given/known data What is the change in the Lagrangian in order that the Lagrangian equations of motion retain their form under the transformation to new coordinates and "time" give by: q = q(Q, [tex]\tau[/tex]) t = t(Q, [tex]\tau[/tex]) 2. Relevant equations The Lagrange equations of motion. *That tau is not supposed to be a superscript of anything. I tried to write the LaTex code myself and it didn't work. It's just supposed to be regular lower case tau. 3. The attempt at a solution I have shown that the Lagrange equations of motion are invariant under a coordinate transformation of the same time, but I can't get this one to workout because I don't know how far I need to take the partials.