After the Oxberg meeting April 1-2

Two immediate homework's have arisen:

1) Hogg & Price-Wheelan will work through the known streams, and see what
feasable observational data are most potential-constraining; then the plan could be that
Brani organizes a coherent follow-up effort.

2) Discussion between Schönrich, Martig, Binney have arisen that it would be good
to have action-space diffusion coefficients from numerical/cosmological simulations.
Bovy and Roskar have a machinery that takes N-body simulations to an analytic potential
machinery, which then allows the Stäckel fudge, and ultimately to calculate
the actions for a particle with (x,v) in an N-body simulation.
At a practical level, it needs to be cleared-up what these diffusion coefficients
depend on t,R,sigma?

The claim is that with p(J,age,[X/H] | t_now) one can get the diffusion history,
under the assumption of p(J,age,[X/H]) was very narrow at birth.


3) Needs to define paper scope with Nina
4) Need to define paper scope with Marie