t=var('t')
y1=function('y1',t)
y2=function('y2',t)
deq1=diff(y1,t)-4*y2
deq2=diff(y2,t)-4*y1-2+16*t**2
sol=desolve_system([deq1,deq2],[y1,y2],ics=[0,3,1])
sol

SageDays/Kreyszig-3.6-8 (last edited 2010-08-12 13:00:31 by PraveenKumar)