Lines Matching refs:y0
12 /* j0(x), y0(x)
37 * Method -- y0(x):
40 * y0(x) = 2/pi*(j0(x)*(ln(x/2)+Euler) + x^2/4 - ...)
41 * therefore y0(x)-2/pi*j0(x)*ln(x) is an even function.
42 * We use the following function to approximate y0,
43 * y0(x) = U(z)/V(z) + (2/pi)*(j0(x)*ln(x)), z= x^2
49 * y0(tiny) = u0 + (2/pi)*ln(tiny), (choose tiny<2**-27)
51 * y0(x) = sqrt(2/(pi*x))*(p0(x)*cos(x0)+q0(x)*sin(x0))
54 * 3. Special cases: y0(0)=-inf, y0(x<0)=NaN, y0(inf)=0.
102 * y0(x) = 1/sqrt(pi) * (P(0,x)*ss + Q(0,x)*cc) / sqrt(x)
142 y0(double x)
150 * y0(NaN) = NaN.
151 * y0(Inf) = 0.
152 * y0(-Inf) = NaN and raise invalid exception.
155 /* y0(+-0) = -inf and raise divide-by-zero exception. */
157 /* y0(x<0) = NaN and raise invalid exception. */
160 /* y0(x) = sqrt(2/(pi*x))*(p0(x)*sin(x0)+q0(x)*cos(x0))
176 * y0(x) = 1/sqrt(pi) * (P(0,x)*ss + Q(0,x)*cc) / sqrt(x)