Programmed motion in the presence of homogeneity

Details Programmed motion in the presence of homogeneity Programmed motion in the presence of homogeneity

Aug 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009an....330..791b&link_type=abstract

Astronomische Nachrichten, Vol.330, Issue 8, p.791

Mathematics

Celestial Mechanics, Stellar Dynamics

Scientific paper

In the framework of the inverse problem of dynamics, we face the following question with reference to the motion of one material point: Given a region T_orb of the xy plane, described by the inequality g(x,y)≤ c0, are there potentials {V=V(x,y) which can produce monoparametric families of orbits f(x,y)=c (also to be found) lying exclusively in the region T_orb? As the relevant PDEs are nonlinear, an answer to this question (generally affirmative, but not with assurance) can be given by the procedure of the determination of certain constants specifying the pertinent functions. In this paper we ease the mathematics involved by making certain simplifying assumptions referring to the homogeneity of both the function g(x,y) (describing the boundary of T_orb) and of the slope function γ(x,y)=fy/fx (representing the required family f(x,y)=c). We develop the method to treat the so formulated problem and we show that, even under these restrictive assumptions, an affirmative answer is guaranteed provided that two algebraic equations have in common at least one solution.

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