Besonderhede van voorbeeld: 9219225086444881676

English

Consider the bundle B1 := (M × N, pr1) with bundle projection pr1 : M × N → M : (x, y) → x.

Chinese

考虑丛 B1 := (M × N, pr1) 带有丛投影 pr1 : M × N → M : (x, y) → x。