每个节点的生成树数目算法程序

xiangpeng395

最好能够举个简单例子说明一下。实在感谢各位！
A:=A-A(the last row);
  u% |+ w( I9 J1 o2 U# v* onum_spn_tree:=det(AA');
for i=1 TO vtsnum DO
{
) l* k0 \9 P- KB:=A;
for j=1 TO edgnum DO
# w% k0 x! H7 q# X! Eif A[i,j]~0
6 U( _) }+ p  ^2 K$ Ythen B=B-A(the_j-the column);
1 }' }+ S0 E4 _: H4 B  j% }B=B-B(the i-th row);
B=B-B(the last row);
nst:=det(BB');
r:=1-nst/num_spn_tree;

, i& _, A" j$ M0 S9 a: a