Subject: [Boost-bugs] [Boost C++ Libraries] #2512: interval cosh: wrong result if interval contains 0 (but is not identical to [0, 0])
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2008-11-19 09:12:58
#2512: interval cosh: wrong result if interval contains 0 (but is not identical to
[0,0])
--------------------------------------------+-------------------------------
Reporter: stephan.puchegger_at_[hidden] | Owner: bgubenko
Type: Bugs | Status: new
Milestone: Boost 1.38.0 | Component: interval
Version: Boost 1.37.0 | Severity: Showstopper
Keywords: |
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The last line (line 179) of the cosh function in the file transc.hpp
should imho read:
return I(static_cast<T>(1), rnd.cosh_up(-x.lower() > x.upper() ? x.lower()
: x.upper()), true);
instead of
return I(static_cast<T>(0), rnd.cosh_up(-x.lower() > x.upper() ? x.lower()
: x.upper()), true);
since the cosh(0) == 1. Otherwise the function will return the wrong
result.
-- Ticket URL: <https://svn.boost.org/trac/boost/ticket/2512> Boost C++ Libraries <http://www.boost.org/> Boost provides free peer-reviewed portable C++ source libraries.
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