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| | Equal Mixed Partials (Site not responding. Last check: 2007-10-13) |
 | | We already showed that a continuous conservative field has equal mixed partials, as it is the gradient of something else. |
 | | If f is defined on a simply connected region, with no holes or singularities, and f has equal mixed partials, it is conservative, and is the gradient of something else. |
 | | Mixed partials are equal and the region is simply connected. |
| www.mathreference.com /ca-vec,emp.html (443 words) |
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