Mathlib Map

Theorems · Definition · order theory

UpperSet.erase

{α : Type u_1} → [inst : Preorder α] → UpperSet α → α → UpperSet α

The biggest upper subset of an upper set s not containing an element a.

Defined in
Mathlib.Order.UpperLower.Closure
Cited by
9 results in Mathlib
Foundations
Depth 12 from the axioms · uses no axioms
Assumes
Preorder

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Cited by9

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