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Theorem expand-cons
⊦ σ ≠ [] → (∃ a, σ0. σ = ⌜a '⌝ + σ0)
Type: A user defined theorem
Validity: The proof is valid.
Features:
Comment:
Used by:
to-unwind-end
,
Used by units in proved state:
Proof exists?: Yes
View
the proof
Infos about the proof
Proved?: Yes
Interactions: 4
Proof steps: 13
Used lemmas:
one-inf
,
fun-nonempty
,
append-finfin
,
fin-empty
,
Used spec theorems:
Used simplifier rules:
list
/
a
list
/
e-01
list
/
c
stream-basic
/
inj-01
nat
/
pred-03
nat
/
elim-pred-c