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Non-collision periodic solutions for singular Hamiltonian systems
Authors:Morched?Boughariou  author-information"  >  author-information__contact u-icon-before"  >  mailto:Morched.Boughariou@fst.rnu.tn"   title="  Morched.Boughariou@fst.rnu.tn"   itemprop="  email"   data-track="  click"   data-track-action="  Email author"   data-track-label="  "  >Email author
Affiliation:(1) Faculté des Sciences de Tunis, Département de Mathématiques, Campus Universitaire, 1060 Tunis, Tunisie
Abstract:We study the existence of classical (non-collision) T-periodicsolutions of the Hamiltonian system
$$openup2pt displaylines{
dot q = H_p (t,p, q),cr
dot p = -H_q (t,p, q),cr
 p(t+T) = p(t),quad q(t+T)=q(t),cr } $$
where 
$ p,q :{bf R} rightarrow {bf R}^N (N geq 3) $
and 
$ H (t,p,q) $
is a T-periodic function in t which has a singularity at 
$ q=0 $
like 
$ H(t,p,q)sim {1 over beta}|p|^{beta}-{1 over
|q|^{alpha}}  hbox{ with };  0<alpha < beta ; hbox{
and} ; beta geq 2. $
Under suitable conditions on H, we prove that if 
$alpha in ]{beta over 2}, beta[$
then (HS) possesses at least onenon-collision solution and if 
$alpha in ]0,{beta over 2}]$
then the generalized solution of (HS) obtained in [5] has at mostone time of collision in its period.
Keywords:35D10  35B40  58E05
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