Link Download ebook Free: https://ouo.io/FNbKPF Symplectic Twist Maps: Global Variational Techniques By: Gole Christophe Publisher: World Scientific Print ISBN: 9789810205898, 9810205899 eText ISBN: 9789812810762, 9812810765 Format: PDF Available from $ 121.00 USD SKU 9789812810762 This book concentrates mainly on the theorem of existence of periodic orbits for higher dimensional analogs of Twist maps. The setting is that of a discrete variational calculus and the techniques involve Conley-Zehnder-Morse Theory. They give rise to the concept of ghost tori which are of interest in the dimension 2 case (ghost circles). The debate is oriented somewhat toward the open problem of finding orbits of all (in particular, irrational) rotation vectors.
