What's F(a|b) in the MuPAD ode::solve output?

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Gaetano Lazzara
Gaetano Lazzara 2015-6-15
编辑： Gaetano Lazzara 2015-6-16
I tried to solve an ode equation with the help of MuPAD. I wrote:
assume(g<>0): assume(.1<phi0<PI/2-.1):
ode::solve(ode({phi''(t)=g/l*cos(phi(t)),phi(0)=phi0,phi'(0)=sqrt(2*g*l*sin(phi0))},phi(t)))
The solution contained many sigma parameters and in someone among these I found a strange function F(a|b) where a and b were another parameters. How can I interpret this F function?
I care about to say I'm not quite a wizard with this kind of things.

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Eric Lin
Eric Lin 2015-6-16
  1 个评论
Gaetano Lazzara
Gaetano Lazzara 2015-6-16
编辑：Gaetano Lazzara 2015-6-16
I didn't know this function. You learn something new everyday.
Thank you.

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