そうかー。もう一年たつのかー。

gosh> (define omega (/ (+ -1 (* (sqrt 3) 0+1i)) 2)) omega gosh> (expt omega 1) -0.5000000000000002+0.8660254037844385i gosh> (expt omega 2) -0.4999999999999996-0.8660254037844388i gosh> (expt omega 3) 1.0+6.432571489356498e-16i gosh> (expt…