Fiber bundle

Japanese: ファイバーバンドル(英語表記)fibre bundle
Fiber bundle
For topological spaces E , B , F , if there is a continuous map p : EB and the following condition holds, then E is said to be a fiber bundle on B with F as its fiber, and p : EB is called its projection. For any point b in B , if we take an appropriate neighborhood U of b , then there exists a homeomorphism between the Cartesian product U × F of U and F and the inverse image p -1 ( U ) of U with respect to p that projects each point ( x , y ) of U × F onto p -1 ( x ). This condition means that p : EB is a Cartesian product locally (i.e., in a certain neighborhood of each point of B ).

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:
位相空間E,B,Fに対して,連続写像pEBがあって,次の条件が成り立つとき,Eは,FをファイバーとするB上のファイバーバンドルであるといい,pEBをその射影という。Bのどの点bについても,bの適当な近傍Uをとれば,UFの直積U×FpによるUの逆像p-1(U)との間に,U×Fの各点(x,y)をp-1(x)の上にうつすような同相写像が存在する。この条件はpEBは局所的には(すなわち,Bの各点のある近傍上では)直積であることを意味している。

出典 株式会社平凡社世界大百科事典 第2版について 情報

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