L := [1,2,5,8,13,18,25,31,41,49,61,71,85,97,113,126, 145,160,181,198,221,240,265,285,313,335,365,389,421, 447,481,508,545,574,613,644,685,718]:
rec := listtorec(L, u(n));
Maple 2015.2
L := [1,2,5,8,13,18,25,31,41,49,61,71,85,97,113,126, 145,160,181,198,221,240,265,285,313,335,365,389,421, 447,481,508,545,574,613,644,685,718]:
rec := gfun[listtorec](L, u(n));
rec := [{-u(n) + u(n + 1) + u(n + 2) - u(n + 3) + u(n + 8)
- u(n + 9) - u(n + 10) + u(n + 11), u(0) = 1, u(1) = 2,
u(2) = 5, u(3) = 8, u(4) = 13, u(5) = 18, u(6) = 25, u(7) = 31,
u(8) = 41, u(9) = 49, u(10) = 61}, ogf]
one needs to insert
gfun:-Parameters('maxordereqn'=11): # or higher; default value is 3
Am Freitag, 13. Oktober 2017 09:14:19 UTC+2 schrieb Thomas Richard:
one needs to insert
gfun:-Parameters('maxordereqn'=11): # or higher; default value is 3
Thanks for the advice Thomas, works for me!
The default value 3 is ridiculously low and should be increased.
Why is the default value 3? Perhaps because in 1994, when gfun
was implemented, computers were much slower and had much less RAM.
It seems this is because I have installed the package
"algolib" from http://algo.inria.fr/libraries/ ... which includes
enhanced versions of the gfun library.
I looked there today to write this reply. It seems the Algo team at
INRIA closed in 2007. But download of algolib is still possible.
Am Mittwoch, 18. Oktober 2017 15:59:46 UTC+2 schrieb G. A. Edgar:
Why is the default value 3? Perhaps because in 1994, when gfun
was implemented, computers were much slower and had much less RAM.
I do understand that 23 years ago software was subject to other
restrictions than today.
What I don't understand is that MapleSoft does not take this fact
into account.
It seems this is because I have installed the package
"algolib" from http://algo.inria.fr/libraries/ ... which includes
enhanced versions of the gfun library.
I looked there today to write this reply. It seems the Algo team at
INRIA closed in 2007. But download of algolib is still possible.
In other words, I do not understand how carelessly and indifferently MapleSoft handles this valuable module. Seemingly they do not even use
the latest version 10 years after the last update.
Thanks for hinting to "algolib"!
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