Dear Simon, Thanks for your answer.
What I want is for a linear combination X(t):=p(t)*y1(t) + q(t)*y2(t) (p and q are known functions) to construct a new second-order differential equation for X(t) from the orgininal system. For a second-order system this can easily be done by hand. I have, however, a fourth-order system. I have written a Maple-program to perform this task for the fourth- order system. I wonder if this can be done with Sage. Regards, Pieter On Nov 27, 5:29 pm, Simon King <[EMAIL PROTECTED]> wrote: > Dear David, > > On Nov 27, 5:16 pm, "David Joyner" <[EMAIL PROTECTED]> wrote: > > > Do you mean something like in the > > tutorialhttp://www.sagemath.org/doc/tut/node14.html > > or do you want something different? > > Looking at the original post, probably Pieter wants to manipulate y1 > (t), y2(t) without to solve the system of equations, since this is > possible with Maple, to some extent: > > > > In Maple it is possible to manipulate with y1(t) and y2(t) without > > > solving the system of equations. > > > > Does there exist a Sage-construct equivalent to the Maple-construct > > > given above? > > So, I guess it is different fromhttp://www.sagemath.org/doc/tut/node14.html > > Cheers, > Simon --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
