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2011-11-02 Richard B. Kreckel <kreckel@ginac.de> Paolo Carlini <paolo.carlini@oracle.com> PR libstdc++/50880 * include/std/complex (__complex_acosh): Fix in a better way, use Kahan's formula. * include/tr1/complex (__complex_acosh): Likewise. From-SVN: r180787