OAI/Geometry/EinsteinFour/OrientationCoverClopenSheet.lean

GitHub source file

5 declarations, 0 contain sorry, 0 declared as axioms

A disconnected two-sheeted orientation cover has a continuous global sheet.

  1. theorem OAI.PositiveEinsteinFour.Geometry.orientationCover_image_clopen line 19
  2. theorem OAI.PositiveEinsteinFour.Geometry.orientationCover_clopen_surjective line 25
  3. theorem OAI.PositiveEinsteinFour.Geometry.orientationCover_clopen_deck_notMem line 30
  4. theorem OAI.PositiveEinsteinFour.Geometry.orientationCover_clopen_projection_bijective line 40
  5. theorem OAI.PositiveEinsteinFour.Geometry.exists_orientationCover_section_of_clopen line 57