M 1 x2 2 m 1 x m 3 0 July 8, 2019 16 32 64 128 M 1 x2 2 m 3 x 2m 3 0 M 1 x2 2 m 3 x m 8 0 X2 2 m 1 x m2 2m 3 0 Cho pt x2 2 m 1 x m 3 0 Cho pt x2 2 m 1 x 2m 3 0 M/(1 - m ^ 2) + 1/(1 + m)