Revision history [back]
 | 1 | initial version |  |
t,a,b = var('t,a,b')
v = function('v',t)
de = diff(v,t)-a*v^2-b
forget()
assume(a>0)
assume(b>0)
print assumptions()
sol=desolve(de, dvar=v, ivar=t)
print sol
forget()
assume(a<0)
assume(b<0)
print assumptions()
sol=desolve(de, dvar=v, ivar=t)
sol| | 2 | No.2 Revision |
You try to pass an assumption on an expression to maxima. Very Likely you can pass an assumption on symbolic variables only.
t,a,b = var('t,a,b')
v = function('v',t)
de = diff(v,t)-a*v^2-b
forget()
assume(a>0)
assume(b>0)
print assumptions()
sol=desolve(de, dvar=v, ivar=t)
print sol
forget()
assume(a<0)
assume(b<0)
print assumptions()
sol=desolve(de, dvar=v, ivar=t)
sol