令l(C)=3,l(e)=6,l(d)=8,l(z)=∞o o minverl(v=lc=3 is the length of a shortest path from a to c. 8 Theorem 5.12: Suppose that mineT l(v)) l(V). Then the length of the shortest path from v, to v'is /(v).❖ l(c)=3，l(e)=6, l(d)=8, l(z)=。 ❖ minvT {l(v)}=l(c)=3 is the length of a shortest path from a to c. ❖ Theorem 5.12：Suppose that minvT {l(v)}= l(v'). Then the length of the shortest path from v1 to v' is l (v')