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From: | Francisco |
Subject: | [Octave-bug-tracker] [bug #60055] regarding to bug #15872: atanh branch cut strangeness |
Date: | Mon, 15 Feb 2021 11:21:21 -0500 (EST) |
User-agent: | Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.150 Safari/537.36 Edg/88.0.705.68 |
Follow-up Comment #4, bug #60055 (project octave): Regarding to precision. The numerical error is also present in using 0.5*log((1+z)/(1-z)) to define atanh. By the way in the version I am running tanh(atanh(z)) present the same numerical errors and zobs - z is not zero. I think that your version is more recient and the atanh functions is coded taking into account the case when the imaginary part is zero. But if you compute with z=1e6 +1.1*i you will see the numerica errors. _______________________________________________________ Reply to this item at: <https://savannah.gnu.org/bugs/?60055> _______________________________________________ Mensaje enviado vía Savannah https://savannah.gnu.org/
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