出典:Wiktionary
Introduced by Michael Herman (1979).
Herman ring (複数形 Herman rings)
出典:Wikipedia
出典:『Wikipedia』 (2011/06/11 15:58 UTC 版)
In the mathematical discipline known as complex dynamics for rational functions, the Herman ring is one of the five types of Fatou components. It was introduced by, and later named after, Michael Herman () who first found and constructed this type of Fatou component. On the Herman ring, the rational function is conformally conjugate to a irrational rotation of the standard annulus. Namely if ƒ possesses a Herman ring U with period p, then there exists a conformal mapping