138 reputation
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location Berkeley, CA
age 30
visits member for 2 years, 1 month
seen Jan 29 at 2:17

Nov
20
revised Coulomb/kepler potential dynamics. NDSolve breaks
added 869 characters in body
Nov
19
comment Coulomb/kepler potential dynamics. NDSolve breaks
@chris I'm still new to mathematica. i looked at the examples, they involve a bit more writing. the second one is planar coordinates. However, looking at the first one, writing eqs in terms of vector (eqs = {{Derivative[1][q][T] == p[T], Derivative[1][p][T] == -q[T]/( 4 Pi Norm[q[T]]^3)}, {q[0] == {1, 0, 0}, p[0] == {0, 0.5, 0}}};)should've given a result but I still run into problems. again, i'm new so some things are confusing.
Nov
19
comment Coulomb/kepler potential dynamics. NDSolve breaks
@NasserM.Abbasi I updated the question, I couldn't find the link to the correct solution but total energy has to be conserved.
Nov
19
revised Coulomb/kepler potential dynamics. NDSolve breaks
added 227 characters in body
Nov
19
revised Coulomb/kepler potential dynamics. NDSolve breaks
added 179 characters in body
Nov
19
comment Coulomb/kepler potential dynamics. NDSolve breaks
@SjoerdC.deVries at the time just before 20, the second curve starts jumping. if you increase time (for example to 200), the motion doesn't look like an orbit.
Nov
19
comment Coulomb/kepler potential dynamics. NDSolve breaks
@chris what do you mean by softening the force?
Nov
19
asked Coulomb/kepler potential dynamics. NDSolve breaks
Nov
4
comment Implementing efficient multiple undo
would be nice to have an undo tree like in vim
Apr
27
awarded  Scholar
Apr
27
accepted print the name of the variable in a list without evaluation
Apr
27
comment print the name of the variable in a list without evaluation
this one is a little hard to understand. can you add more info? # is the argument of a pure function, <> is string joint. What does &@ mean?I can see it starts the pure function.
Apr
27
awarded  Student
Apr
27
awarded  Editor
Apr
27
revised print the name of the variable in a list without evaluation
added 356 characters in body
Apr
27
asked print the name of the variable in a list without evaluation
Mar
11
awarded  Supporter