# Math Help - Method of charasteristics

1. ## Method of charasteristics

How can I solve this problem?
$\frac{\mathrm{d}r}{0}=\frac{\mathrm{d}z}{C}=\frac{ \mathrm{d}u}{0}=\frac{\mathrm{d}v}{0}=\frac{d \Theta}{0}$, where C is a constant.
I gained it via the solution of a linear partial differential equation and $\Theta=\Theta(r,z),\ u=u(r,z),\ v=v(r,z)$.
I have a thought, could anybody check, whether it is good or not?
From the first equality $0 \mathrm{d} z=C \mathrm{d} r \implies r=k_1$. Similarly, $0 \mathrm{d} z=C \mathrm{d} u \implies u=k_2$, etc. So the general solution is $u=u(r),\ v=v(r),\ \Theta=\Theta(r).$

Thanks, Zoli