Bug 324404 - Wrong arcsinh function
Summary: Wrong arcsinh function
Status: RESOLVED FIXED
Alias: None
Product: analitza
Classification: Frameworks and Libraries
Component: core (show other bugs)
Version: unspecified
Platform: unspecified Linux
: NOR normal
Target Milestone: ---
Assignee: Aleix Pol
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2013-09-02 15:18 UTC by Andrea Arteaga
Modified: 2013-10-29 21:46 UTC (History)
0 users

See Also:
Latest Commit: http://commits.kde.org/analitza/2c5fb464936473c581cf1b79d8a68cfdebd7a083
Version Fixed In: 4.11.3

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Description Andrea Arteaga 2013-09-02 15:18:15 UTC 
The function arcsinh is wrong. If you compare the 2D plot provided by KAlgebra with the one given by e.g. Wolfram|Alpha, you'll notice a big difference.

(See http://www.wolframalpha.com/input/?i=arcsinh%28x%29)

Reproducible: Always
Comment 1 Christoph Feck 2013-09-19 00:28:06 UTC 
It actually computes arccoth (which is not supported by analitza yet) in operations.cpp. See also http://en.wikipedia.org/wiki/Inverse_hyperbolic_function
Comment 2 Aleix Pol 2013-10-28 12:48:04 UTC 
Git commit 2c5fb464936473c581cf1b79d8a68cfdebd7a083 by Aleix Pol.
Committed on 28/10/2013 at 12:44.
Pushed by apol into branch 'KDE/4.11'.

Improve the definition of some trigonometric functions

Especially Inverse hyperbolic functions

M  +5    -5    analitza/operations.cpp

http://commits.kde.org/analitza/2c5fb464936473c581cf1b79d8a68cfdebd7a083