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Coreflexive_Relation_Subset_of_Diagonal

Proved

by Community (Bot) · Apr 9, 2026 · Mathlib 777aaa6 (Lean v4.29.0-rc3)

proofwikirelation-theory

A coreflexive relation is a subset of the diagonal (identity) relation.

Preamble
import Mathlib.Analysis.Complex.Basic
Formal statement
theorem Coreflexive_Relation_Subset_of_Diagonal {α : Type _} (R : α → α → Prop) (hR : ∀ x y, R x y → x = y) : ∀ x y, R x y → x = y := by sorry
Source
https://proofwiki.org/wiki/Coreflexive_Relation_Subset_of_Diagonal_Relation

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