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Theorem bytes2int-first-lez

⊦ b2i(int2bytes(i).first) < 0 ↔ i < 0

Type: A user defined theorem
Validity: The proof is valid.
Features: simp, localsimp,
Comment:
Used by: bytes2int-first-gez, int2bytes-fillsgn-rec, int2bytes-first, int2bytes-len-le, int2bytes-len-le-neg, int2bytes-len-le-neg-02, rightshift-8-01-01,
Used by units in proved state:
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 3
Proof steps: 5
Used lemmas: int2int, int2bytes-empty, bytes2int-first-neq, int2bytes-first-neg,
Used spec theorems:
- list/bytelist/fr
Used simplifier rules: