Re: expm1(3p): Mathematical error in given example

["Alejandro Colomar (man-pages)" <alx.manpages@gmail.com>]

Hi XA,

On 2/11/21 10:59 AM, xenoantares@gmx.net wrote:
>   Hi there!
> 
> In the APPLICATION USAGE section of expm1(3p)[1] the given example is wrong:
> 
> ===8<=== Snip =========================================
> 
> [..] calculations of ((1+x)n-1)/x, namely:
> 
>            expm1(n * log1p(x))/x
> 
> ======== Snap ====================================>8===
> 
> Actually, both expressions are not equal, rather
> 
>  expm1(n * log1p(x))/x = ((1+x)**n - 1)/x
> 
> (with a fictional ** as power infix-operator) would be.
> 
> 
>   Best regards
>           -- XA
> 
> ____
> [1] As of version to be found at
>     https://man7.org/linux/man-pages/man3/expm1.3p.html
> --
> XenoAntares
> 

We don't maintain the source of the POSIX manual pages.  You could file
a bug to the Austin Group.  I checked that in expm1(3) that doesn't happen.

Thanks,

Alex

-- 
Alejandro Colomar
Linux man-pages comaintainer; https://www.kernel.org/doc/man-pages/
http://www.alejandro-colomar.es/