From: Walter Harms <wharms@bfs.de>
To: "xenoantares@gmx.net" <xenoantares@gmx.net>,
"mtk.manpages@gmail.com" <mtk.manpages@gmail.com>,
"alx.manpages@gmail.com" <alx.manpages@gmail.com>
Cc: "linux-man@vger.kernel.org" <linux-man@vger.kernel.org>
Subject: AW: expm1(3p): Mathematical error in given example
Date: Thu, 11 Feb 2021 10:54:47 +0000 [thread overview]
Message-ID: <58d4a802d07e43cb9a819ddd5b974ed3@bfs.de> (raw)
In-Reply-To: <1169008777.20210211105918@gmx.net>
yes, this is wrong on the webpage but issems a converter bug.
when i look at the page in ascii i see: ((1+x)**n-1)/x.
the same problem arises on other place like:
These functions shall compute ex-1.0.
should read: e**x-1.0
NTL: thx for info
wh
________________________________________
Von: xenoantares@gmx.net <xenoantares@gmx.net>
Gesendet: Donnerstag, 11. Februar 2021 10:59:18
An: mtk.manpages@gmail.com; alx.manpages@gmail.com
Cc: linux-man@vger.kernel.org
Betreff: expm1(3p): Mathematical error in given example
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
next prev parent reply other threads:[~2021-02-11 10:59 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-11 9:59 expm1(3p): Mathematical error in given example xenoantares
2021-02-11 10:54 ` Walter Harms [this message]
2021-02-11 15:49 ` Alejandro Colomar (man-pages)
2021-02-12 9:41 ` Jakub Wilk
2021-02-14 11:34 ` Michael Kerrisk (man-pages)
2021-02-14 12:23 ` Alejandro Colomar (man-pages)
2021-02-14 17:27 ` Michael Kerrisk (man-pages)
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