Hi kcrisman, just some followups: Have added the following to ask.sagemath.org http://ask.sagemath.org/question/1265/how-to-dynamically-substitute-a-variable-in-a
Have applied the http://trac.sagemath.org/sage_trac/ticket/11143 patch (along with this patch as well http://trac.sagemath.org/sage_trac/ticket/11513 ) and get this for a 1/2 integration of sin(x) -1/2*(sqrt(x)*sin(x)*exp_integral_e(1/2, -I*x) + sqrt(x)*sin(x)*exp_integral_e(1/2, I*x) + I*sqrt(x)*cos(x)*exp_integral_e(1/2, -I*x) - I*sqrt(x)*cos(x)*exp_integral_e(1/2, I*x) - 2*limit(1/2*sqrt(-t)*sin(x)*exp_integral_e(1/2, -I*t) + 1/2*sqrt(-t)*sin(x)*exp_integral_e(1/2, I*t) - 1/2*I*sqrt(-t)*cos(x)*exp_integral_e(1/2, -I*t) + 1/2*I*sqrt(-t)*cos(x)*exp_integral_e(1/2, I*t), t, 0, minus))/sqrt(pi) This seems to be promising, except that minus needs to be replaced by -Infinity, and then I get an error message relating to the limit function. ValueError: call the limit function like this, e.g. limit(expr, x=2). I've also confirmed that the _limit_latex() error *IS* related to pretty printing. -- To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
