Lines Matching defs:erfc
47 * Performance of erfc(x):
59 * double erfc(double x)
66 * erfc(x) = 1-erf(x)
72 * erfc(x) = 1 - erf(x) if x<=0.25
95 * erfc(x) = (1-c) - P1(s)/Q1(s)
109 * erfc(x) = (1/x)exp(-x*x-(.5*log(pi) -.5z + R(z)/S(z))
115 * erfc(x) = (1/x)exp(-x*x-(.5*log(pi)+eps + zP(z))
122 * erfc(x) ~ ---------- * ( 1 + Poly(1/x^2) );
129 * erfc*x*exp(x*x) ~ 1/sqrt(pi);
142 * erfc(x) = tiny*tiny (raise underflow)
146 * erfc(0) = 1, erfc(inf) = 0, erfc(-inf) = 2,
147 * erfc/erf(NaN) is NaN
215 * Coefficients for approximation to erfc in [2, 4]
233 * Coefficients for approximation to erfc in [1.25, 2]
251 * Coefficients for approximation to erfc in [4,28]
327 extern double erfc(x)
332 if (isnan(x)) /* erfc(NaN) = NaN */
334 else if (x > 0) /* erfc(+-inf)=0,2 */