1-3)The law of motion of negative mass and negative mass

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- m1 ------ - m2
fig03. Ngative mass - m1 and negative mass - m2 (initial velocity =0, m1>0, m2> 0)
In this case, momentum conservation is valid.
, because, let's view to the acceleration term.

,

is opposite direction(spherical coordinate +r direction). So, velocity direction is opposite direction.
In the spherical coordinate

In the rectangular coordinate
Negative mass and negative mass: Both two objects are accelerated in the direction of + r which extends distance r, so as time passes, the distance between them is greater than initially given condition, and
the force between them is attraction, but the effect is repulsive.
The force is attraction(-Gm1m2/r^2), thus the potential energy between them has negative value.
If negative mass and positive mass were born together at the beginning of universe,
positive mass has attractive effect each other, so it forms star and galaxy structure now, but negative mass has repulsive effect each other, so they cannot make massive mass structure like star or galaxy.
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Hypothesis of Dark Matter and Dark Energy with Negative Mass :
http://vixra.org/abs/0907.0015