questions about tensors,variable transformations

*To*: mathgroup at yoda.physics.unc.edu*Subject*: questions about tensors,variable transformations*From*: dmm0t at rincewind.mech.virginia.edu (David Meyer)*Date*: Mon, 14 Sep 92 11:10:02 EDT

I'm a fairly new mathematica user, and I have a couple of questions that hopefully have simple answers. Second, is there a way to transform the dependent variable in a differential equation? For example, I'm using a transformation xi=x, eta=y/f(x) that I'd like to apply. This is easily done in macsyma, but I haven't figured out how to do it in mathematica, and it's a huge pain to go back and forth between the two. Alternately, is there a package which will take mathematica output and move it into macsyma, and vice-versa? Thanks in advance to anyone who can help, Dave -- David M. Meyer Mechanical & Aerospace Engineering dmm0t at virginia.edu University of Virginia dmm0t at rincewind.mech.Virginia.EDU (NeXTmail)