4.26.3 Can you answer these questions?

4.26.3.1 Sorting a list of rules
4.26.3.2 Plotting orbits of trajectories of bodies sharing the earth's orbit in coordinates centered at the barycenter of the solar system
4.26.3.3 Mathematica not releasing RAM
4.26.3.1 Sorting a list of rules

https://mathematica.stackexchange.com/questions/149862/sorting-a-list-of-rules

 
When we give several definitions for a function f, the DownValues of f are automatically sorted with respect to the domain defined by the pattern: 
 
f[x_]:=2; 
f[x_?Positive] := 3; 
f[1]=4; 
...
 
- asked by Fred Simons 3votes
4.26.3.2 Plotting orbits of trajectories of bodies sharing the earth's orbit in coordinates centered at the barycenter of the solar system

https://mathematica.stackexchange.com/questions/151069/plotting-orbits-of-trajectories-of-bodies-sharing-the-earths-orbit-in-coordinat

 
I am attempting to try and plot the trajectories of a trio of satellites that are orbiting with the earth-moon system around the solar system's barycenter. Originally, I had the satellites in orbit  ...
 
- asked by SSoltero 1vote
4.26.3.3 Mathematica not releasing RAM

https://mathematica.stackexchange.com/questions/151127/mathematica-not-releasing-ram

 
The following code is supposed to sequentially read data from a large CSV file and put it row by row into an SQL server.  Although I thought RAM consumption should be constant the system keeps asking  ...
 
- asked by user13892 2votes