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Theorem len-04

⊦ a ' + x0 = x + b ' + y + c ' + z → # x + # z < # x0

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: 1
Proof steps: 2
Used lemmas: c, len-05, len, in-empty, c-06, Nil, in-rec, in-append, a, in-14,
Used spec theorems:
- Used simplifier rules: