Since level convergence topology is weaker than the topology induced by the Supremum metric on fuzzy numbers space, this conclusion essentially extends the results of Wu cong-xin and Wu cong. 4.

• 由于模糊数空间上的水平收敛拓扑比由上确界度量 导出的拓扑弱，故此结论实质上推广了吴从忻、吴冲的结果。