shù > shù chú yùn suàn
mùlù
No. 1
  yòu guān :r(x,y)s(x,y)
  rs
  abcbcd
  a1b1c2b1c2d1
  a1b2c3b2c1d1
  a1b2c1b2c3d2
  ......
  r÷s de jiēguǒ wéi a1
  x xiāng dāng ay xiāng dāng b,cz xiāng dāng d
   'àn zhào chú yùn suàn guī men guān zhù d
   zhǐ jiào b,c dāng s guān zhōng de b,c suǒ yòu de (b1,c2)(b2,c3)(b2,c1) chū xiàn zài r guān zhōng shí , jiēguǒ cái wéi a
No. 2
  yòu guān :R(x,y)S(x,y)
  RS
  ABCBCD
  a1b1c2b1c2d1
  a1b2c3b2c1d1
  a1b2c1b2c3d2
  ......
  R÷S de jiēguǒ wéi a1
  x xiāng dāng Ay xiāng dāng B,Cz xiāng dāng D
   'àn zhào chú yùn suàn guī men guān zhù D
   zhǐ jiào B,C dāng S guān zhōng de B,C suǒ yòu de (b1,c2)(b2,c3)(b2,c1) chū xiàn zài R guān zhōng shí , jiēguǒ cái wéi A