Nuprl Lemma : free-dl-meet_wf_list
∀[X:Type]. ∀[as,bs:X List List]. (free-dl-meet(as;bs) ∈ X List List)
Proof
Definitions occuring in Statement :
free-dl-meet: free-dl-meet(as;bs),
list: T List,
uall: ∀[x:A]. B[x],
member: t ∈ T,
universe: Type
Definitions unfolded in proof :
uall: ∀[x:A]. B[x],
member: t ∈ T,
free-dl-meet: free-dl-meet(as;bs),
so_lambda: λ2x y.t[x; y],
so_apply: x[s1;s2]
Lemmas referenced :
list_accum_wf,
list_wf,
nil_wf,
append_wf,
map_wf
Rules used in proof :
sqequalSubstitution,
sqequalTransitivity,
computationStep,
sqequalReflexivity,
isect_memberFormation,
introduction,
cut,
sqequalRule,
extract_by_obid,
sqequalHypSubstitution,
isectElimination,
thin,
cumulativity,
hypothesisEquality,
hypothesis,
lambdaEquality,
axiomEquality,
equalityTransitivity,
equalitySymmetry,
isect_memberEquality,
because_Cache,
universeEquality
Latex:
\mforall{}[X:Type]. \mforall{}[as,bs:X List List]. (free-dl-meet(as;bs) \mmember{} X List List)
Date html generated:
2020_05_20-AM-08_26_55
Last ObjectModification:
2017_01_21-PM-04_42_53
Theory : lattices
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