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Theorem byte-len

⊦ ¬ 8 < # int2bits(b2i(by))

Type: A user defined theorem
Validity: The proof is valid.
Features: simp, localsimp,
Comment:
Used by: byte-bitlength, byte-bitlength-01, ubyte-neg,
Used by units in proved state: bytes,
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 1
Proof steps: 2
Used lemmas: byte-length,
Used spec theorems:
- Used simplifier rules:
  - int2bits/int2bits-not-empty
  - list-data/bitlista/l
  - nat/fle-01
  - nat/fle
  - nat-basic1/f
  - int2bits/int2bits-neg-num
  - int2bits/uint2bits-pos-num
  - int2bits/uint2bits-one
  - list/bitlista/Two
  - list/bitlista/Last
  - bitopsaux/invert-zero
  - bitopsaux/invert-one
  - bitopsaux/inv-false
  - list/bitlista/c
  - list/bitlista/a
  - bitopsaux/succ-rec
  - bitopsaux/succ-zero
  - bitopsaux/sgn-rec
  - bitopsaux/sgn-base-01
  - list/bitlista/len
  - list/bitlista/len-02