

11.5 Using the Divergence and Stoke's Theorems to Help with Integrals


Sometimes we want to evaluate a circulation type path integral along a path
on which the evaluation seems difficult, while there is another path with the
same endpoints on which the integration would be easy. We can then use Stokes'
theorem to relate the difference between the two to a flux integral of the curl
of the vector integrand over a region between them. If the vector field of the
integrand is conservative, its curl will vanish and the two path integrals will
be the same. Even when the field is not conservative, the flux integral involved
may be relatively easy.
Examples
Caution
Example