Filter.ker_sup

∀ {α : Type u_2} (f g : Filter α), (f ⊔ g).ker = f.ker ∪ g.ker

Defined in: Mathlib.Order.Filter.Ker
Cited by: 2 results in Mathlib
Foundations: Depth 68 from the axioms · uses propext, Classical.choice, Quot.sound

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