const math.a4

2 uses

	math (current package)
		erfinv.go#L21: 	a4 = 1.6235862515167575384252e4
		erfinv.go#L95: 		z1 := ((((((a7*r+a6)*r+a5)*r+a4)*r+a3)*r+a2)*r+a1)*r + a0