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Theorem del-three

⊦ 2 < # s → #(s -- a -- b) ≠ 0

Type: A user defined theorem
Validity: The proof is valid.
Features: simp, localsimp,
Comment:
Used by:
Used by units in proved state:
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 0
Proof steps: 14
Used lemmas: del-in, Delete, del-size, del-rax,
Used spec theorems:
- Used simplifier rules: