Download or read book A Geometric Mechanism for Diffusion in Hamiltonian Systems Overcoming the Large Gap Problem written by Amadeu Delshams and published by American Mathematical Soc.. This book was released on 2006 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt: Beginning by introducing a geometric mechanism for diffusion in a prioriunstable nearly integrable dynamical systems, this book is based onthe observation that resonances, besides destroying the primary KAMtori, create secondary tori and tori of lower dimension. It argues thatthese objects created by resonances can be incorporated in transitionchains taking the place of the destroyed primary KAM tori.The authorsestablish rigorously the existence of this mechanism in a simple modelthat has been studied before. The main technique is to develop a toolkitto study, in a unified way, tori of different topologies and their invariantmanifolds, their intersections as well as shadowing properties of thesebi-asymptotic orbits. This toolkit is based on extending and unifyingstandard techniques.