| import Mathlib | |
| namespace OAI | |
| open scoped Pointwise symmDiff | |
| namespace Ostmann | |
| theorem main : ∀ A B : Set ℕ, A.Nontrivial → B.Nontrivial → | |
| Set.Infinite ((A + B) ∆ {n : ℕ | Nat.Prime n}) := by | |
| sorry | |
| end Ostmann | |
| end OAI | |
| import Mathlib | |
| namespace OAI | |
| open scoped Pointwise symmDiff | |
| namespace Ostmann | |
| theorem main : ∀ A B : Set ℕ, A.Nontrivial → B.Nontrivial → | |
| Set.Infinite ((A + B) ∆ {n : ℕ | Nat.Prime n}) := by | |
| sorry | |
| end Ostmann | |
| end OAI | |