`inv'
-----

inv(I,M)
     :: M ˡȤ I εտ

RETURN
     
I,M
     

   * IA == 1 mod (M) ʤ A .
   * I  M ϸߤǤǤʤФʤʤ, `inv()' ϤΥåϹ
     ʤ.

     [71] igcd(1234,4321);  
     1
     [72] inv(1234,4321);
     3239
     [73] irem(3239*1234,4321);
     1


     `igcd'

