This is a diagram which is to be used to show the derivation of Kirchhoff's inegral theorem
<a href="//commons.wikimedia.org/w/index.php?title=User:Epzcaw&amp;action=edit&amp;redlink=1" class="new" title="User:Epzcaw (page does not exist)">Epzcaw</a>
2011-04-24
<span class="int-own-work" lang="en">Own work</span>