Lines Matching refs:atanh
30 /* atanh(x)
32 * 1.Reduced x to positive by atanh(-x) = -atanh(x)
35 * atanh(x) = --- * log(1 + -------) = 0.5 * log1p(2 * --------)
39 * atanh(x) = 0.5 * log1p(2x + 2x * x / (1 - x))
42 * atanh(x) is NaN if |x| > 1 with signal;
43 * atanh(NaN) is that NaN with no signal;
44 * atanh(+-1) is +-INF with signal.
53 atanh (double x)
96 } /* atanh */