Mathematics: right-handed and the other right hand thumb finger perpendicular to 4, the index finger does not move, the other three fingers with vertical palm, the thumb points in the x-axis, y-axis is the index finger, the other three fingers of the z-axis
unity: left-handed and the other left thumb finger 4 vertically, the index finger does not move, the other three fingers with vertical palm, the thumb points in the x-axis, y-axis is the index finger, the other three fingers of the z-axis