Negative dual webpage in the network communication concept lattice

Much achievement had obtained about H-A webpage pair generated on Hub webpage and Authority webpage by applying formal concept lattice theory. A novel question was proposed and researched about Hub webpage which must NOT link to Authority webpage(s); and Authority webpage must NOT be linked to Hub webpage(s). these both webpage are called negative dual webpage. In this paper, sufficient and necessary condition and its' rigorous proof about judgment the Hub webpage u and the Authority webpage m are negative dual webpage in H-A webpage pair was given.