Solution
= Solution
The field is $\nabla f$ for $f=\rho\sin\phi\,e^{-\rho^2-z^2}$. Hence $I=0$, either directly or by the <fundamental theorem for line integrals>.
= Solution
The field is $\nabla f$ for $f=\rho\sin\phi\,e^{-\rho^2-z^2}$. Hence $I=0$, either directly or by the <fundamental theorem for line integrals>.