The Cauchy–Riemann conditions are a set of partial differential equations which, along with certain other criteria, guarantee a complex function will be holomorphic (that is, complex differentiable), since they garuntee that angles will be preserved by a mapping. Given a function , the Cauchy–Riemann conditions are
or, using the polar representation of a complex function in terms of
For any function which respects the Cauchy–Riemann conditions, will also obey Laplace's equation. This can easily be seen by differentiating a second time.
This complex analysis-related article contains minimal information concerning its topic. You can help the Mathematics Wikia by adding to it.