I tried integrating two equation with the same structure, the first equation fails to evaluate completely - the answer is still in terms of integration. The second integration evaluated fine. The only difference between these two equation is that the first equation uses subscripts in the variable names. Does that mean Mathematica doesn't handle subscripted variables well?
The first equation:
Integrate[(Subscript[c, 1] Subscript[x, 1] +
Subscript[c, 2] Subscript[x, 2]) Sqrt[(Subscript[c, 1] Subscript[y, 1] +
Subscript[c, 2] Subscript[y, 2]) (Subscript[c, 1] Subscript[z, 1] +
Subscript[c, 2] Subscript[z, 2])], Subscript[c, 1], Subscript[c, 2]]
The second equation:
Integrate[(c1 x1 + c2 x2) Sqrt[(c1 y1 + c2 y2) (c1 z1 + c2 z2)], c1, c2]
Symbolize
from the Notations package is often maligned around here but IMO is useful in many cases such as this $\endgroup$ – Mike Honeychurch Dec 12 '16 at 23:57Integrate[(c[1] x[1] + c[2] x[2]) Sqrt[(c[1] y[1] + c[2] y[2]) (c[1] z[1] + c[2] z[2])], c[1], c[2]]
. Definitely a problem withIntegrate
. People always want to pick on poor old subscripts! $\endgroup$ – Simon Rochester Dec 13 '16 at 6:11