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genfunc[rgf_charseq] - find characteristic sequence of a rational generating function
Calling Sequence
rgf_charseq(Fz, z, Fn, n)
Parameters
Fz
-
rational generating function
z
name, generating function variable
Fn
expression for nth term of the sequence encoded by Fz
n
name, index variable for Fn
Description
This command returns the characteristic sequence of Fz as a function of Fn.
The characteristic generating function Cz of Fz is defined as:
The sequence encoded by Cz is the characteristic sequence of Fz.
The value FAIL is returned if Fz is a trivial rational generating function.
The command with(genfunc,rgf_charseq) allows the use of the abbreviated form of this command.
Examples
See Also
denom, genfunc, genfunc/rgf_encode, genfunc/rgf_expand, genfunc[termscale], ldegree, tcoeff
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