>>403

・例1
 a_1 = 0.7714225971
  (a^8 -9a^6 +30a^4 -30a^2 +9 =0 の正根)
 r = 0.63632317
  ((1+r)(1-r^3)-3rr = 0 の実根)
 M = r(1-rr)^(3/2)/(1-r^3)= 0.393502193

>>404

・例3
 r ={(2+√3)^(2/3)+(2-√3)^(2/3)- 1}/4 = 0.45541
  (4r^3 +3rr -1 = 0 の実根)
 M ={(207+48√3)^(1/3)+(207-48√3)^(1/3)- 1}/24
  (M^3 +(1/8)M^2 -(1/6)M -(1/27)= 0 の実根)