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August  2015, 35(8): 3827-3855. doi: 10.3934/dcds.2015.35.3827

## Continuous averaging proof of the Nekhoroshev theorem

 1 Department of mathematics, the University of Chicago, Chicago, IL, 60637, United States

Received  August 2013 Revised  December 2014 Published  February 2015

In this paper we develop the continuous averaging method of Treschev to work on the simultaneous Diophantine approximation and apply the result to give a new proof of the Nekhoroshev theorem. We obtain a sharp normal form theorem and explicit estimates of the stability constants appearing in the Nekhoroshev theorem.
Citation: Jinxin Xue. Continuous averaging proof of the Nekhoroshev theorem. Discrete & Continuous Dynamical Systems, 2015, 35 (8) : 3827-3855. doi: 10.3934/dcds.2015.35.3827
##### References:
 [1] A. Bounemoura and J.-P. Marco, Improved exponential stability for near-integrable quasi-convex Hamiltonians, Nonlinearity, 24 (2011), 97-112. doi: 10.1088/0951-7715/24/1/005.  Google Scholar [2] A. Córdoba, D. Córdoba and M. Fontelos, Formation of singularities for a transport equation with nonlocal velocity, Annals of Mathematics, 162 (2005), 1377-1389. doi: 10.4007/annals.2005.162.1377.  Google Scholar [3] J. Féjoz, M. Guardia, V. Kaloshin and P. Raldan, Kirkwood gaps and diffusion along mean motion resonance in the restricted planar three-body problem,, , ().   Google Scholar [4] A. Kiselev, F. Nazarov and A. Volberg, Global well-posedness for the critical 2D dissipative quasi-geostrophic equation, Inventiones Math., 167 (2007), 445-453. doi: 10.1007/s00222-006-0020-3.  Google Scholar [5] P. Lochak, Canonical perturbation theory via simultaneous approximation, Russian Mathematical Surveys, 47 (1992), 57-133. doi: 10.1070/RM1992v047n06ABEH000965.  Google Scholar [6] P. Lochak, Simultaneous Diophantine approximation in classical perturbation theory: Why and what for? Progress in nonlinear science., 1 RAS, Inst. Appl. Phys., Nizhnii (Novgorod, (2002), 116-138.  Google Scholar [7] P. Lochak and A. I. Neishtadt, Estimates of stability time for nearly integrable systems with a quasiconvex Hamiltonian, Chaos, 2 (1992), 495-499. doi: 10.1063/1.165891.  Google Scholar [8] P. Lochak, A. I. Neishtadt and L. Niederman, Stability of nearly integrable convex Hamiltonian systems over exponentially long times. Kuksin, S. (ed.) et al., Seminar on dynamical systems. Basel: Birkhäuser. Prog. Nonlinear Diff. Equ. Appl. 12 (1994), 15-34.  Google Scholar [9] L. Niederman, Stability over exponentially long times in the planetary problem, Nonlinearity, 9 (1996), 1703-1751. doi: 10.1088/0951-7715/9/6/017.  Google Scholar [10] N. Nekhorochev, An exponential estimate of the time of stability of nearly integrable Hamiltonian systems, Russ. Math. Surv., 32 (1977), 5-66, 287.  Google Scholar [11] J. Pöschel, Nekhoroshev estimates for quasi-convex Hamiltonian systems, Mathematische Zeitschrift, 213 (1993), 187-216. doi: 10.1007/BF03025718.  Google Scholar [12] A. Pronin and D. Treschev, Continuous averaging in multi-frequency slow-fast systems, Regular and Chaotic Dynamics, 5 (2000), 157-170. doi: 10.1070/rd2000v005n02ABEH000138.  Google Scholar [13] D. Treschev and O. Zubelevich, Introduction to the Perturbation Theory of Hamiltonian Systems, Springer Monographs in Mathematics. Springer-Verlag, Berlin, 2010. doi: 10.1007/978-3-642-03028-4.  Google Scholar [14] D. V. Treschev, The continuous averaging method in the problem of separation of fast and slow motions, Regular and Chaotic Dynamics, 2 (1997), 9-20.  Google Scholar [15] D. Treschev, Separatrix splitting for a pendulum with rapidly oscillating suspension point, Russian J. Math. Phys., 5 (1997), 63-98.  Google Scholar

show all references

##### References:
 [1] A. Bounemoura and J.-P. Marco, Improved exponential stability for near-integrable quasi-convex Hamiltonians, Nonlinearity, 24 (2011), 97-112. doi: 10.1088/0951-7715/24/1/005.  Google Scholar [2] A. Córdoba, D. Córdoba and M. Fontelos, Formation of singularities for a transport equation with nonlocal velocity, Annals of Mathematics, 162 (2005), 1377-1389. doi: 10.4007/annals.2005.162.1377.  Google Scholar [3] J. Féjoz, M. Guardia, V. Kaloshin and P. Raldan, Kirkwood gaps and diffusion along mean motion resonance in the restricted planar three-body problem,, , ().   Google Scholar [4] A. Kiselev, F. Nazarov and A. Volberg, Global well-posedness for the critical 2D dissipative quasi-geostrophic equation, Inventiones Math., 167 (2007), 445-453. doi: 10.1007/s00222-006-0020-3.  Google Scholar [5] P. Lochak, Canonical perturbation theory via simultaneous approximation, Russian Mathematical Surveys, 47 (1992), 57-133. doi: 10.1070/RM1992v047n06ABEH000965.  Google Scholar [6] P. Lochak, Simultaneous Diophantine approximation in classical perturbation theory: Why and what for? Progress in nonlinear science., 1 RAS, Inst. Appl. Phys., Nizhnii (Novgorod, (2002), 116-138.  Google Scholar [7] P. Lochak and A. I. Neishtadt, Estimates of stability time for nearly integrable systems with a quasiconvex Hamiltonian, Chaos, 2 (1992), 495-499. doi: 10.1063/1.165891.  Google Scholar [8] P. Lochak, A. I. Neishtadt and L. Niederman, Stability of nearly integrable convex Hamiltonian systems over exponentially long times. Kuksin, S. (ed.) et al., Seminar on dynamical systems. Basel: Birkhäuser. Prog. Nonlinear Diff. Equ. Appl. 12 (1994), 15-34.  Google Scholar [9] L. Niederman, Stability over exponentially long times in the planetary problem, Nonlinearity, 9 (1996), 1703-1751. doi: 10.1088/0951-7715/9/6/017.  Google Scholar [10] N. Nekhorochev, An exponential estimate of the time of stability of nearly integrable Hamiltonian systems, Russ. Math. Surv., 32 (1977), 5-66, 287.  Google Scholar [11] J. Pöschel, Nekhoroshev estimates for quasi-convex Hamiltonian systems, Mathematische Zeitschrift, 213 (1993), 187-216. doi: 10.1007/BF03025718.  Google Scholar [12] A. Pronin and D. Treschev, Continuous averaging in multi-frequency slow-fast systems, Regular and Chaotic Dynamics, 5 (2000), 157-170. doi: 10.1070/rd2000v005n02ABEH000138.  Google Scholar [13] D. Treschev and O. Zubelevich, Introduction to the Perturbation Theory of Hamiltonian Systems, Springer Monographs in Mathematics. Springer-Verlag, Berlin, 2010. doi: 10.1007/978-3-642-03028-4.  Google Scholar [14] D. V. Treschev, The continuous averaging method in the problem of separation of fast and slow motions, Regular and Chaotic Dynamics, 2 (1997), 9-20.  Google Scholar [15] D. Treschev, Separatrix splitting for a pendulum with rapidly oscillating suspension point, Russian J. Math. Phys., 5 (1997), 63-98.  Google Scholar
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