OK, thanks. Seems incredibly painfull! Pity Maple can't offer something more direct

OK, thanks. Seems incredibly painfull! Pity Maple can't offer something more direct

Thanks for your answer.However, I need to have the "1" not in italics. Is that feasible?

Thanks for your answer.However, I need to have the "1" not in italics. Is that feasible?

Thanks for the RootOf tip, that's a big help.

BTW, Small typo, fsolve should be evalf, i.e., evalf(Int(Int(1,rbar=0..RootOf(f(r,z)-1,r)),z=0..1));

Thanks for the RootOf tip, that's a big help.

BTW, Small typo, fsolve should be evalf, i.e., evalf(Int(Int(1,rbar=0..RootOf(f(r,z)-1,r)),z=0..1));