const math.f4

2 uses

	math (current package)
		erfinv.go#L63: 	f4 = 1.112800997078859844711555e-3
		erfinv.go#L107: 			z2 = ((((((f7*r+f6)*r+f5)*r+f4)*r+f3)*r+f2)*r+f1)*r + f0