> I would do it like this: > > > x = var('x') # independent variable > b = var('b') # constant > > y = function('y', x) # unknown function > > # define 2nd order ODE; (undampened spring with unit of mass attached) > myode = diff(y,x,2)+b*y == 0 # define 2order ODE > > assume(b>0) # mass is always possitive > > f = desolve_laplace(de = myode,dvar = y, ivar=x) > > I should return an expression like: > > cos(sqrt(b)*x)*y(0) + sin(sqrt(b)*x)*D[0](y)(0)/sqrt(b)
Thanks. It helped me. -- Priyanka Kapoor http://kapoorpriyanka.in Linux User Group, Ludhiana -- 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