2. in : |R|
IdLnk
3. out : |R|
IdLnk
4. i : |R|
5. j : |R|
6. ring(R;in;out)
7.
i = p(j)
8. n(
x.n(x)^d(i;j)-1(i)) = j
9.
k:
. k<d(i;j) 
x.n(x)^k(i) = j
10.
x.n(x)^d(i;p(j))(i) = p(j)
11.
k:. k<d(i;p(j)) x.n(x)^k(i) = p(j)
12. n(p(j)) = j
13.
x.n(x)^d(i;p(j))+1(i) = j
14. d(i;j)
d(i;p(j))+1
15.
d(i;p(j))d(i;j)-1
16. d(i;j)-1
17.
x.n(x)^d(i;j) = (x.n(x)) o (x.x) o x.n(x)^d(i;j)-1
18.
i,j:|R|. n(i) = n(j) i = j
x.n(x)^d(i;j)-1(i) = p(j)
