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Ruud H.G. van Tol on Fri, 09 Feb 2024 18:48:09 +0100
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Re: floor(tanh(91)) depends on the precision
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- To: pari-dev@pari.math.u-bordeaux.fr
- Subject: Re: floor(tanh(91)) depends on the precision
- From: "Ruud H.G. van Tol" <rvtol@isolution.nl>
- Date: Fri, 9 Feb 2024 18:48:01 +0100
- Delivery-date: Fri, 09 Feb 2024 18:48:09 +0100
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On 2024-02-09 18:25, Georgi Guninski wrote:
There was discussion about this on sage-devel mailing list.
I don't claim it is a bug, just FYI:
? floor(tanh(91))
%1 = 1
? default(realprecision,10^4)
? floor(tanh(91))
%3 = 0
? default(realprecision, 79)
? tanh(91)
%2 = 0.999...
? default(realprecision, 78)
? tanh(91) < 1
%3 = 1
See also https://www.wolframalpha.com/input?i=tanh%2891%29
and click on [More digits].
-- Ruud