文件名称：关于θ-加细性 (1983年)
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更新时间：2024-06-15 18:59:57
自然科学 论文
In this paper the preimage problem-and hereditarility of 9-refinability are dis-cussed.The main results are as followsi (1) The preimage of weakly de-refinable (δθ-refinable,weakly θ-refinable) space under a continuous closed mapping with f-1 (y) Lindelof