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theorem proved term proof

join_emp

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formal statement (Lean)

 112theorem join_emp (Γ : Config) : join Γ emp = Γ := by

proof body

Term-mode proof.

 113  rw [join_comm, emp_join]
 114
 115/-- Independence on the right: `emp` is independent of everything from
 116both sides by symmetry. -/

used by (1)

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depends on (14)

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