Theorems · Theorem · order theory
countableInfClosed_preimage_ofDual
∀ {α : Type u_2} [inst : LE α] {s : Set α}, CountableInfClosed (⇑OrderDual.ofDual ⁻¹' s) ↔ CountableSupClosed s- Defined in
- Mathlib.Order.CountableSupClosed
- Cited by
- 1 results in Mathlib
- Foundations
- Depth 14 from the axioms · uses Quot.sound
- Assumes
- LE
Around this declaration
Dashed lines are statement dependencies; solid lines are citations in proofs.
Cites10
Mathlib declarations this one mentions in its statement or cites explicitly in its proof. Plumbing is filtered out.
- DFunLike.coestatement and proof · cited by 62,936
- Setstatement and proof · cited by 53,352
- Equivstatement · cited by 8,337
- Set.preimagestatement and proof · cited by 4,946
- OrderDualstatement · cited by 927
- OrderDual.ofDualstatement and proof · cited by 400
- CountableInfClosedstatement and proof · cited by 27
- CountableSupClosedstatement and proof · cited by 27
- CountableSupClosed.isLUB_memproof · cited by 10
- CountableInfClosed.isGLB_memproof · cited by 10
Cited by1
Results whose statement or proof uses this declaration.
- CountableSupClosed.dualproof · cited by 0