(6-4-15)


(6-4-17)
��Ci-k+1 (t) = [Vi] T Ni(t), i = k-1,k,…,n-k+1

(6-4-18)
= [Bi-k, k+1(t), Bi-k+1, k+1(t), …, Bi, k+1 (t)]T,