More generally, given a uniform space X, a filter F on X is called Cauchy filter if for every entourage U there is an A \in F with (x, y) \in U for every x, y \in A.

 
  • 帶阻濾波器允許低于和高于特定頻率范圍的信號通過(guò),對于這個(gè)范圍內的頻率阻止通過(guò)。
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan