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Theorem blastN-len
⊦ n ≤ # x → # butlastn(n, x) = # x - n
Type: A user defined theorem
Validity: The proof is valid.
Features: simp, localsimp,
Comment:
Used by:
blastN-all
,
blastn-len-0
,
Used by units in proved state:
Proof exists?: Yes
View
the proof
Infos about the proof
Proved?: Yes
Interactions: 5
Proof steps: 12
Used lemmas:
blastN-rec
,
butlastN-base
,
Used spec theorems:
list
/
lastdiv
Used simplifier rules:
nat
/
elim-sub
nat
/
lep
list-data
/
size-01
nat-basic2
/
z-01
list
/
in-17
list
/
in-append
list
/
e-02
list
/
in-15
nat-basic2
/
add-base
nat
/
pred-03
nat
/
elim-pred-c
nat-basic2
/
oz
nat-basic2
/
eq-01
list
/
len
list
/
len-02
list
/
a
nat-basic2
/
s
nat-basic1
/
ref-1
nat-basic2
/
a
nat-basic2
/
c