82 citations · 273 across the 13 of their papers we have counts for
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math.SG2012★ 1 cited
The Hormander index of symmetric periodic orbits
Urs Frauenfelder, Otto van Koert
A symmetric periodic orbit is a special kind of periodic orbit that can also be regarded as a Lagrangian intersection point. Therefore it has two Maslov indices whose difference is…
math.SG2012★ 33 cited
The Conley-Zehnder indices of the rotating Kepler problem
Peter Albers, Joel W. Fish, Urs Frauenfelder +1
We determine the Conley-Zehnder indices of all periodic orbits of the rotating Kepler problem for energies below the critical Jacobi energy. Consequently, we show the universal cov…