有限子覆蓋 的英文怎麼說

中文拼音 [yǒuxiànzi]
有限子覆蓋 英文
endliche teilueberdeckung finite subcover
  • : 有副詞[書面語] (表示整數之外再加零數): 30 有 5 thirty-five; 10 有 5年 fifteen years
  • : Ⅰ名詞(指定的范圍; 限度) limit; bounds Ⅱ動詞(指定范圍, 不許超過) set a limit; limit; restrict
  • : 子Ⅰ名詞1 (兒子) son 2 (人的通稱) person 3 (古代特指有學問的男人) ancient title of respect f...
  • : 動詞1. [書面語] (蓋住) cover 2. [書面語] (底朝上翻過來; 歪倒) overturn; upset 3. 同 「復」 (Ⅱ1. 2. )
  • : 蓋名詞(姓氏) a surname
  • 有限 : limited; restricted; finite; a little; not much
  • 覆蓋 : 1 (遮蓋) cover; overlap 2 (植被) plant cover; vegetation3 (保護層 覆蓋物) cover; covering; ...
  1. Every open covering of x has a finite sub-covering.

    每個開一個有限子覆蓋
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  3. It is a main task of general topology to compare different spaces. mappings which connect different spaces are important tools to complete it. which mapping preserves some special generalized metric space is a basic probleme in investigating generalized metric spaces by mappings. g - first countable spaces and g - metri / able spaces have many important topological properities so to investigate which mapping preserves them is very necessary. in [ 7 ], clnian liu and mu - ming dai prove that open - closed mappings preserve g - metri / able spaces ; whether open mappings preserve g - first countable spaces is an open probleme asked by tanaka in [ 6 ]. in [ 4 ], sheng - xiang xia introduces weak opewn mappings and investigates the relations between them and 1 - sequence - covering mappings. in the second section of this article, we investigate weak open mappings have the relations with other mappings and prove that the finite - to - one weak open mappings preserve g - first countable, spaces and weak open closed mapping preserve g - metrizable spaces. in the third section, we investigate an example to show that perfect mappings do not preserve g - first countable spaces, g - metrizable spaces, sn - first countable spaces and sn - metrizable spaces

    在文獻[ 4 ]中,夏省祥引進了弱開映射,並研究了它和1 -序列映射的關系。本文在第二節研究了弱開映射與序列商映射,幾乎開映射的關系,證明了到一的弱開映射保持g -第一可數空間;弱開閉映射保持g -度量空間。第三節研究了文獻[ 5 ]中的一個例,證明了完備映射不保持g -第一可數空間, g -度量空間, sn -第一可數空間, sn -度量空間。
  4. X is quasi-compact(that is, every open covering of x has a finite sub-covering).

    X是擬緊的(即對于X的每個開一個有限子覆蓋)。
  5. For a given finite connected graph f, a group h of automorphisms of f and a finite group a = z, du, kawk and xu ( see [ 6 ] ) get some new matrix - theoretical characterizations to classify all the connected regular coverings of f having a as its covering transformation group, on which each automorphism in h can be lifted

    設為連通圖, h為它的自同構群的一個群, a為給定一個初等交換p -群。杜少飛, kawk和徐明曜用矩陣的方法將的正則連通圖進行了分類,其中以a作其為變換群,並且h可提升。
  6. X is quasi - compact ( that is, every open covering of x has a finite sub - covering )

    X是擬緊的(即對于x的每個開一個有限子覆蓋) 。
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