Phragmen–Brouwer theorem
= Phragmen–Brouwer theorem
{wiki=Phragmen–Brouwer_theorem}
The Phragmén–Brouwer theorem is a result in complex analysis, specifically within the context of the behavior of holomorphic functions. It generalizes the maximum modulus principle and provides conditions under which a holomorphic function can achieve its maximum on the boundary of a domain.