t=var('t')
y1=function('y1',t)
y2=function('y2',t)
deq1=diff(y1,t)-5*y2-23
deq2=diff(y2,t)+5*y1-15*t
sol=desolve_system([deq1,deq2],[y1,y2],ics=[0,1,-2])
sol

SageDays/Kreyszig-3.6-11 (last edited 2010-08-12 13:29:19 by PraveenKumar)