In 1930 he received a fellowship from the Rockefeller Foundation to study classical mechanics with George Birkhoff at Harvard, but his appointment was at the Harvard College Observatory.
Hopf link | Eberhard Schrader | Karl Hopf | Hopf algebra | Eberhard of Friuli | Eberhard Jäckel | Eberhard Esche | Martin Eberhard | Eberhard Zeidler | Eberhard von Gemmingen | Eberhard III, Duke of Württemberg | Eberhard II, Count of Württemberg | Eberhard I, Duke of Württemberg | Eberhard Faber | Eberhard Blum | Eberhard | Robert Eberhard Launitz | Hopf bifurcation | Hans Hopf | Eberhard Wolfgang Möller | Eberhard Vogel | Eberhard van der Laan | Eberhard IV "the Younger" | Eberhard III | Eberhard II | Eberhard I, Count of Württemberg | Eberhard I, Count of Bonngau | Eberhard Hopf | Eberhard Carl | Eberhard Burger |
In the mathematical theory of bifurcations, a Hopf or Poincaré–Andronov–Hopf bifurcation, named after Henri Poincaré, Eberhard Hopf, and Aleksandr Andronov, is a local bifurcation in which a fixed point of a dynamical system loses stability as a pair of complex conjugate eigenvalues of the linearization around the fixed point cross the imaginary axis of the complex plane.