Hello again, Thank you very much for the previous help. Some of the research I do involves using actions to calculate things like the Euler Lagrange equations. I was wondering if this is possible to do in Sage. For example, if I had the Lagrangian
Nabla_mu(phi) Nabla^mu (phi)-m^2*phi^2 how would I go about constructing one? I tried simply defining it, but I keep getting the attribute 'sage.symbolic.expression.Expression' object has no attribute '_domain' when I try and take the covariant derivative of it. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
