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Theorem split-first

n ≤ # x ⊦ ∃ y, z. x = y + z ∧ # y = n

Type: A user defined theorem
Validity: The proof is valid.
Features:
Comment:
Used by: split-rest,
Used by units in proved state: list-last,
Proof exists?: Yes

View the proof

Infos about the proof