There seems to be an issue with indexed variables and the instruction "DGsetup" of the differential geometry package when used with Maple 17. An error is returned to the effect that DGsetup is expecting independent variables to be unassigned names. This phenomenon does not occur with Maple 16!
Here is what I get:
> with(DifferentialGeometry); with(Tools); with(Tensor); with(LinearAlgebra);
Executing the following command, I get an error with Maple 17 which does not occur with Maple 16!
> DGsetup([seq(x[i], i = 1 .. 4)], M, verbose);
Error, (in DifferentialGeometry:-DGsetup) expected 1st independent variable to be an unassigned name, received: x
Is there any fix for this problem?