Let Tμ,b,m be the higher order commutator generated by a generalized fractional integral operator Tμ and a BMO function b. In this paper, we will study the bo
<正>Let D(U,V,W) be an oriented 3-partite graph with |U|=P,|V|=q and|W|=r. For any vertex x in D(U,V,W),let d_x~+ and d_x~- be the outdegree and indegree of x r