[GiNaC-list] Re: Airy functions

[alexander baker]

Alexei,

Could you provide an example to highlight the following statement?

>However, for arbitrary precision calculation the accuracy can be
arbitrary high,
>so the interval could be arbitrary big.

Regards,

Alex Baker

On 29/12/2007, Richard B. Kreckel <kreckel at ginac.de> wrote:
> Alexei Sheplyakov wrote:
> >>   // approximation for smallest number so that 1+tol > 1
> >>   numeric tol=ex_to<numeric>(3*pow(ex(10),ex(-(Digits-2))));
> >
> > Not really.
>
> Let me just add that plain CLN does come with a better function for
> that. From the manual:
> `cl_F float_epsilon (float_format_t f)'
>    Returns the smallest floating point number e > 0 such that 1+e != 1.
>
>    -richy.
> --
> Richard B. Kreckel
> <http://www.ginac.de/~kreckel/>
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