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The statement of the Schwarz Lemma was its own section in the article, but it should be a sub-section of the Schwarz Lemma sub-section. |
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The '''Schwarz lemma''', named after [[Hermann Amandus Schwarz]], is a result in [[complex analysis]] about [[holomorphic functions]] from the [[open set|open]] [[unit disk]] to itself. The lemma is less celebrated than stronger theorems, such as the [[Riemann mapping theorem]], which it helps to prove. It is however one of the simplest results capturing the rigidity of holomorphic functions.
====Statement====
<blockquote>'''Schwarz Lemma.''' Let '''D''' = {''z'' : |''z''| < 1} be the open [[unit disk]] in the [[complex number|complex plane]] '''C''' centered at the [[origin (mathematics)|origin]] and let ''f'' : '''D''' → '''D''' be a [[holomorphic map]] such that ''f''(0) = 0.
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