Figure 3: Curves of for different combination of and in (2.1). (a) . The inputs can be shown by a curve, and the inputs ,, and can be shown by other different curves, respectively. (b) . The inputs can be shown by one curve, and the inputs ,, and can be shown by other different curves, respectively. (c) . The inputs can be shown by one curve, and for the inputs ,, and can be shown by other different curves, respectively. (d) . The inputs can be shown by one curve, and the inputs ,,, and can be shown by other different curves, respectively. Different logic functions can be obtained from Figures 3(a), 3(b), 3(c) and 3(d) with the same and .