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A universal covering has simply connected total space, so its associated subgroup of the base fundamental group is trivial. The trivial subgroup is normal; hence every universal covering map is a normal covering map.

Ancestors (8)

  1. Normal covering map
  2. Classification of connected covering spaces
  3. Covering space
  4. Algebraic topology
  5. Geometry and topology
  6. Area of mathematics
  7. Mathematics
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