The problem is some quantifications , which we have in a pack of galaxies .
In the site http://perso.wanadoo.fr/claude.morichon/
(which is renovate on this question ) we have a study of the Newton's law .
The problem is specially when few gravitons , which come from the other
particles , go through a particle . In this case we have a quantification
when only one graviton go through a particle during k proper periods of the
particle , k is a whole number . We have a resonance . But it is necessary
to have few matter to have this resonance .
The calculations are hard . But with some simplifications we see we have
a possible explanation of this problem .
But if this is right the galaxies are nearly some spheres in the pack ,
and it is necessary to see if this is correct .
Moeover it seems the new Newton's law gives a solution of all the problems
of the dark matter even for the lens .
The calculations are very difficult . Roughly aR takes the place of GM/R
when GM/R is smaller than aR , a is the quantum of acceleration .