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Published in: Journal of Dynamical and Control Systems 4/2013

01-10-2013

Generic Transitivity for Couples of Hamiltonians

Author: Vito Mandorino

Published in: Journal of Dynamical and Control Systems | Issue 4/2013

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Abstract

We study orbits and reachable sets of generic couples of Hamiltonians H 1, H 2 on a symplectic manifold N. We prove that, C k -generically for k large enough, orbits coincide with the whole of N and that the same is true for reachable sets when N is compact. Our results are stated in terms of a strong form of genericity which makes use of the notion of rectifiable subsets of positive codimension in Banach or Fréchet spaces.

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Footnotes
1
This should be more properly called a pseudogroup, since the flows may not be complete.
 
2
It is also stronger than some other notions of translational invariant ‘smallness’ in infinite-dimensional spaces, such as prevalence or Aronszajn nullity (see [3]).
 
3
We will always assume that, given H 1 as above, the family \(\{N^{l}\}_l\) has been chosen once for all. Such a choice will never play any role.
 
4
In [2] the terminology ‘Poisson stable’ rather than ‘non-wandering’ is used.
 
5
A Fredholm map of index i between separable Banach spaces is a C 1 map such that the differential is Fredholm of index i at every point (recall that the index is locally constant).
 
6
Recall that in Assumption 1, we defined T N 0 as the union \(\bigcup_{l\in{\mathbb{N}}}T N^{l}\) where \(\{N^{l}\}_l\) is a once-for-all fixed countable family of submanifolds of codimension greater than or equal to codim N 0 and whose union covers N 0.
 
7
Note that ψ also induces a change of coordinates on J k − 1(N,ℝ), which is of class C 1 because ψ is of class C k . Hence, the codimension of W′ is the same as the codimension of its image under this diffeomorphism. This legitimates the subsequent computations (and accounts for the requirement \(H_1\in C^{\ k+1}\) rather than just C k ).
 
8
Note that ψ×id also induces a local diffeomorphism of class C 1 from (a subset of) J k − 1(N×ℝ,ℝ) to J k − 1(U×ℝ,ℝ), thus preserving codimensions of subsets.
 
9
For reasons of page layout, the matrix A(j ′) written here is rather the transpose of what it should be according to the matrix in Eq. 4.1.
 
Literature
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Metadata
Title
Generic Transitivity for Couples of Hamiltonians
Author
Vito Mandorino
Publication date
01-10-2013
Publisher
Springer US
Published in
Journal of Dynamical and Control Systems / Issue 4/2013
Print ISSN: 1079-2724
Electronic ISSN: 1573-8698
DOI
https://doi.org/10.1007/s10883-013-9197-0

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