G(V1) G(V2) G(V3) UA U U6 U5 (b)的路径 令V={v1,V2V3,V42V5,V6,V7,v 令V1={v172V8},V2={v2,v3,v5,v6},V={4, strongly connected components 令G(V1,G(V2),G(V)❖ V ={v1 ,v2 ,v3 ,v4 ,v5 ,v6 ,v7 , v8 } ❖ V1={v1 ,v7 ,v8 }, V2={v2 ,v3 ,v5 ,v6 }, V3={v4 }, ❖ strongly connected components : ❖ G(V1 ),G(V2 ),G(V3 )