thanks for the answers. They helped a lot. Now I am going to add more equations to the same system.

In 1-D math, I also noticed that you can simply use the whole name without quoutes, works good, but the commands get largers: i.e.:

epsilon[0]:=8.85e-12*Unit(ampere*second/volt/meter);

that was it, I had m=1 somewhere in the document.

But I am worried now that I need to take care of all the unit names from now on, maybe putting everything in single quotes:

Unit('A'*'s'/'V'/'m');

is there any other way to tell maple that unit names are not variables?

thanks.

thanks.

thanks!

both were helpful.

all the best.

All works well now. :-)