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Theorem filt-n
⊦ ¬ a ∈ y → filter(a ' + x, y) = filter(x, y)
Type: An axiom
Validity: The proof is valid.
Features: simp, localsimp,
Comment:
Used by:
del1
,
del1-01
,
dups-app
,
f-rm
,
filt-dups
,
filter-all
,
filter-dups
,
filter-empty
,
filter-empty-cons-01
,
filter-empty-def
,
filter-notin
,
filter-one-02
,
in-01-01
,
le
,
notin-02
,
Used by units in proved state:
list-perm
,
Proof exists?: No