Theorems · Definition · algebraic topology
homotopyGroupEquivZerothHomotopyOfIsEmpty
{X : Type u_2} →
[inst : TopologicalSpace X] → (N : Type u_3) → (x : X) → [IsEmpty N] → HomotopyGroup N X x ≃ ZerothHomotopy XThe homotopy "group" indexed by an empty type is in bijection with
the path components of X, aka the ZerothHomotopy.
- Defined in
- Mathlib.Topology.Homotopy.HomotopyGroup
- Cited by
- 0 results in Mathlib
- Foundations
- Depth 162 from the axioms · uses propext, Classical.choice, Quot.sound
- Assumes
- TopologicalSpaceIsEmpty
Around this declaration
Dashed lines are statement dependencies; solid lines are citations in proofs.
Cites8
Mathlib declarations this one mentions in its statement or cites explicitly in its proof. Plumbing is filtered out.
- TopologicalSpacestatement and proof · cited by 24,529
- Equivstatement · cited by 8,337
- IsEmptystatement and proof · cited by 759
- Homeomorph.toEquivproof · cited by 77
- ZerothHomotopystatement · cited by 15
- HomotopyGroupstatement · cited by 7
- Quotient.congrproof · cited by 1
- genLoopHomeoOfIsEmptyproof · cited by 0
Cited by1
Results whose statement or proof uses this declaration.
- HomotopyGroup.pi0EquivZerothHomotopyproof · cited by 0