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Theorem int2bytes-butlast

⊦ i < ~128 ∨ 128 ≤ i → int2bytes(i).butlast = int2bytes(i >> 8)

Type: A user defined theorem
Validity: The proof is valid.
Features:
Comment:
Used by: int2bytes-rec-shift,
Used by units in proved state:
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 15
Proof steps: 36
Used lemmas: int2bytes-byte, int2bytes-minus-one, int2bytes-zero, int2bytes-empty, int2bytes-last-01, int2bytes-rec-case,
Used spec theorems:
Used simplifier rules:
- int-abs/lels-02
- int-abs/anti
- int-abs/numlsledel
- int-abs/zero-gels-03
- int-abs/forward-le-03
- int-abs/forward-le-04
- int-basic1/ls-01
- int-abs/sub-eq
- int-abs/abs-08
- int-abs/neg-13
- int-abs/numls-02
- int-abs/numlelsdel-01
- int-basic2/add-a
- int-basic2/add-c
- intops/rightshift-zero
- int-basic1/numlsf
- int-abs/numlelsdel
- int-basic1/numlslsdel
- int-div/div-zero-03
- int-basic1/forward-pos
- int-abs/forward-le
- int-abs/forward-le-01
- int-abs/forward-lels
- int-abs/numleledel-01
- list/bytelist/a
- list-last/bytelist/butlast-def
- list-last/bytelist/b
- int-abs/lels-04
- int-abs/lels-03
- int-abs/lels
- int-abs/lels-01