Bill Allombert on Thu, 04 Aug 2011 10:56:08 +0200

 Re: Bessel Functions

```On Wed, Aug 03, 2011 at 05:09:51PM +0000, McLaughlin, James wrote:
> Thanks for information about the Bessel functions - besseli it is.
>
> (However, typing bessel then twice the tab key does not do anything)
>
> I tried your suggestion of an extra parameter in the taylor command previously, but it did not work.
>
> I just installed
>                   GP/PARI CALCULATOR Version 2.3.4 (released)
> in case there was a problem with an earlier version but the problem is still there.
>
> Also none of the ?? or ??? commands work.
> Here is some output:
>
> (12:53) gp > ?taylor
> taylor(x,y): taylor expansion of x with respect to the main variable of y.
>
> (12:54) gp > ??taylor
>   ***   [pipe:] 'C:/Program\ Files/PARI/perl.exe C:/Program\ Files/PARI/gphelp -
> cu 6 -fromgp  'taylor@3'' failed.
> (12:55) gp > taylor(1/(1-x),x,500)
>   ***   expected character: ')' instead of: taylor(1/(1-x),x,500)

With GP 2.3 you had to do
\ps500
taylor(1/(1-x),x)