正常超球面 的英文怎麼說
中文拼音 [zhēngchángchāoqiúmiàn]
正常超球面
英文
proper hypersphere- 正 : 正名詞(正月) the first month of the lunar year; the first moon
- 超 : Ⅰ動詞1 (越過; 高出) exceed; surpass; overtake 2 (在某個范圍以外; 不受限制) transcend; go beyo...
- 球 : 名詞1 (以半圓的直徑為軸 使半圓旋轉一周而成的立體; 由中心到表面各點距離都相等的立體) sphere; glo...
- 面 : Ⅰ名詞1 (頭的前部; 臉) face 2 (物體的表面) surface; top 3 (外露的一層或正面) outside; the ri...
- 正常 : normal; regular; average
- 球面 : spherical surface; sphere球面艙壁 spherical bulkhead; 球面車床 spherical turning lathe; 球面反射...
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A related set of " quantum gravity " theories postulates the existence of parallel universes - some perhaps mutant versions of our own, like " bizarro world " in the old superman comics - existing beyond the borders of our little cosmos. " infinite earths in parallel universes really exist, " the normally sober scientific american once hyperventilated on its cover
一些相關的「量子重力」理論設定存在多個平行的宇宙,其中一些,就像老版超人喜劇中的那個「伊扎爾世界」 ,是我們這個宇宙的變異,它們存在於我們小小宇宙的邊緣之外,正常而清醒的《科學美國人》雜志有一次在封面上用粗體字醒目地寫著: 「無限個地球真實地存在於多個平行的宇宙間。 」In the second part, we investigate the compact submanifolds m with the parallel isoperimetric section in the real space forms rm ( c ) and prove that if there exists a parallel isoperimetric section on m, and the sectional curvature of m is always greater than zero, then m is contained in a hyper - sphere ; and get that the gauss curvature of the compact surfaces m with constant mean curvature in constant curvature space r4 ( c ) is always greater than zero, then m is a totally geodesic surface or a sphere, where an isoperimetric on m means a unit normal vector field defined globally on m with m1 ( ) = constant
( 2 )研究了實空間形式r ~ m ( c )中具有平行等參截面的緊致子流形m ,證明了具有一平行等參截面的子流形m ,如果m的截面曲率恆正,則m包含在r ~ m ( c )的一個超球面內;對于常曲率空間及r ~ 4 ( c )中具有常平均曲率的緊致曲面m ,如果m的高斯曲率處處大於零,則m或為r ~ m ( c )中的全測地曲面或為一球面。這里m上的等參截面是m上整體定義的單位法向量場,使得m關於它的平均曲率m _ 1 ( )是常數。
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