The *indefinite* integral of zero is an arbitrary constant (not only
zero)
Compare more 'concrete' version
sage: y = function('y',x)
sage: a = 1 + diff(y,x) == 0
sage: var('t')
t
sage: assume(t>0)
sage: integrate(a,(x,0,t))
t - y(0) + y(t) == 0Andrzej Chrzeszczyk -- To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
