I have been using sage to solve for the eigenvectors and eigenvalues of a 4x4 symbolic matrix. It takes a few hours, but sage is able to return the solutions. My dilemma is that the resulting expressions are *HUGE*. If I ask sage to display one of the eigenvalues on screen (not using show()) it takes several minutes and then finally displays a loooong, truncated string. As a specific example, the full text file containing the output of the first eigenvalue.real_part() is 8.6 MB.
Sooo.... I am currently working on trying to simplify the resulting expressions in sage to shrink them down to a smaller size. Here is the problem: I notice that my expressions contain *a lot* of terms like this, arctan2(0, looooooooooooong_expression). Now I know that arctan2(0,x) = 0 for all x and so this should simplify my expressions a great deal. However, I cannot get sage to make this simplification for me. Simplify() and simplify_full() do not touch these terms. Does anyone have an idea about how to address this trigonometric simplification? Thanks so much! -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
