f64/approx.go
func Approx(x, y float64) bool {
	eps := epsilon64 * 100
	return math.Abs(x-y) < eps*(1.0+math.Max(math.Abs(x), math.Abs(y)))
}
func Approx(x, y float64) bool {
	eps := epsilon64 * 100
	return math.Abs(x-y) < eps*(1.0+math.Max(math.Abs(x), math.Abs(y)))
}
// Approx returns true if x ~= y