/* * call-seq: * dvector.acosh -> a_dvector * * Returns of copy of _dvector_ with entry x replaced by acosh(x). * * a = Dvector[ 5.1, 2.2, 1.3 ] * a.acosh -> Dvector[ acosh(5.1), acosh(2.2), acosh(1.3) ] */ VALUE dvector_acosh(VALUE ary) {