The Editors-in-Chief have retracted this article [1] because it significantly overlaps with a previously published article by Pang et al. [2]. The article also shows evidence of authorship manipulation. The identity of the corresponding author could not be verified; the University of Ioannina have confirmed that Mohamed Vetro has not been affiliated with their institution. The authors have not responded to correspondence regarding this retraction.

中文翻译：

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缩回注意：函数泛函的Levin型边界行为并允许某些下限

总编辑撤回了这篇文章[1]，因为它与Pang等人先前发表的文章有很大的重叠。[2]。本文还显示了作者身份操纵的证据。无法验证通讯作者的身份；约阿尼纳大学已经证实，穆罕默德·韦特罗（Mohamed Vetro）尚未加入其学院。作者尚未对有关撤回的信件做出回应。