Opened 14 years ago
Closed 13 years ago
#2512 closed Bugs (fixed)
interval cosh: wrong result if interval contains 0 (but is not identical to [0,0])
| Reported by: | Owned by: | Boris Gubenko | |
|---|---|---|---|
| Milestone: | Boost 1.38.0 | Component: | interval |
| Version: | Boost 1.37.0 | Severity: | Showstopper |
| Keywords: | Cc: |
Description
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.
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(In [59350]) Applied patches to fix #2512 and #2513