= Bloch's theorem (complex variables)
{wiki=Bloch's_theorem_(complex_variables)}
Bloch's theorem, which is often discussed in the context of complex analysis and the theory of analytic functions, states that if \\( f \\) is a holomorphic function (analytic function) defined on a simply connected open subset \\( D \\subset \\mathbb\{C\} \\), and if \\( f \\) is not constant, then for any point \\( z_0 \\in D \\), there exists a neighborhood \\( U \\) of \\( z_0 \\) such that the image \\(
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