On Saturday, November 2, 2013 12:23:00 AM UTC+1, brombo wrote: > > Consider Lagrangian field theory where the derivatives are taken with > respect to the gradient of a field. In the case of quantum electrodynamics > with respect to the gradient of a spinor field. >
Yes, that would be needed. I am wondering, is there a generic algorithm for functional derivatives, or is it more likely to be a complicated matter? -- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sympy+unsubscr...@googlegroups.com. To post to this group, send email to sympy@googlegroups.com. Visit this group at http://groups.google.com/group/sympy. For more options, visit https://groups.google.com/groups/opt_out.
