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Theorem lenequal
unique_al(ax), unique_al(ax0), # ax = # ax0, ∀ a. a ∈ ax → a ∈ ax0, b ∈ ax0 ⊦ b ∈ ax
Type: A user defined theorem
Validity: The proof is valid.
Features:
Comment:
Used by:
Used by units in proved state:
Proof exists?: Yes
View
the proof
Infos about the proof
Proved?: Yes
Interactions: 6
Proof steps: 12
Used lemmas:
app
,
nuni-01
,
nuni
,
inkeys-n
,
ex
,
inone
,
unique-r
,
inapp
,
Used spec theorems:
Used simplifier rules:
list-data
/
size-nil
list-data
/
l
list
/
a
list
/
c
nat-basic
/
succ
list
/
len-05
nat-basic
/
c
nat-basic
/
a
nat-basic
/
eq-01
list
/
len