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bio website insignificancegalore.net
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age 40
visits member for 3 years, 9 months
seen Jan 20 at 20:23

Apr
24
awarded  Yearling
Apr
24
awarded  Teacher
May
3
awarded  Editor
May
3
revised Solid angle spanned by disc/rewriting expression with elliptic integrals
added 379 characters in body
May
3
comment Solid angle spanned by disc/rewriting expression with elliptic integrals
@JM Let's call it a physicists rewriting :). I quietly assume z>0 and do not take special care about the cases $r=0$ and $r=1$ since the function must obviously be continuous. I'll make this more precise in the question.
May
3
comment Solid angle spanned by disc/rewriting expression with elliptic integrals
Thanks, JM for your comment as well as the clarification of the background. What I was really hoping for was a way of rewriting the expression without the canceling discontinuities in order to eventually get a nice expression for the gradient of the solid angle.
Mar
3
asked Solid angle spanned by disc/rewriting expression with elliptic integrals
Jan
26
comment Stability of a generalized form of the Mathieu equation
Thanks. I thought I remembered something along these lines -- thus my question about whether it even makes sense to talk about stability in this case. Good point with the asymptotic behavior. For my immediate needs, I expect to get by by numerically finding the basin of attraction for the origin for a specific set of parameters.
Jan
25
awarded  Student
Jan
25
asked Stability of a generalized form of the Mathieu equation
Dec
2
comment My Daughter's 4th grade math question got me thinking
@Michael: I agree with you that it is not immediately obvious why using modulo like this works: To me, learning about modular arithmetic (en.wikipedia.org/wiki/Modular_arithmetic), as this is called, was what convinced me that group theory is a useful tool.
Dec
1
awarded  Supporter