Source: wikibot/weyl-s-lemma-laplace-equation
= Weyl's lemma (Laplace equation)
{wiki=Weyl's_lemma_(Laplace_equation)}
Weyl's lemma is a result in the theory of partial differential equations, particularly concerning solutions to the Laplace equation. The lemma states that if a function \\( u \\) is harmonic (i.e.