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Theorem sgn-empty-01

⊦ sgn(bits) = [] ↔ bits = []

Type: A user defined theorem
Validity: The proof is valid.
Features: simp, localsimp,
Comment:
Used by: fill-sgn, fill-sgn-03, sgn-last-same, sgn-nls,
Used by units in proved state: intops, int2bits, bytes, byte,
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 0
Proof steps: 1
Used lemmas: sgn-empty, sgn-not-empty,
Used spec theorems:
- Used simplifier rules: