const math.d6

2 uses

	math (current package)
		erfinv.go#L48: 	d6 = 7.7441459065157709165577218e-4
		erfinv.go#L103: 			z2 = ((((((d7*r+d6)*r+d5)*r+d4)*r+d3)*r+d2)*r+d1)*r + d0