Nuprl Lemma : imageset_wf
∀[B,f:coSet{i:l}]. (imageset(B;f) ∈ coSet{i:l})
Proof
Definitions occuring in Statement :
imageset: imageset(B;f),
coSet: coSet{i:l},
uall: ∀[x:A]. B[x],
member: t ∈ T
Definitions unfolded in proof :
so_apply: x[s],
prop: ℙ,
so_lambda: λ2x.t[x],
imageset: imageset(B;f),
member: t ∈ T,
uall: ∀[x:A]. B[x]
Lemmas referenced :
setmem_wf,
coSet_wf,
orderedpair-snd_wf,
seteq_wf,
existssetmem_wf,
sub-set_wf
Rules used in proof :
because_Cache,
isect_memberEquality,
equalitySymmetry,
equalityTransitivity,
axiomEquality,
cumulativity,
setEquality,
hypothesis,
rename,
setElimination,
lambdaEquality,
hypothesisEquality,
thin,
isectElimination,
sqequalHypSubstitution,
extract_by_obid,
sqequalRule,
cut,
introduction,
isect_memberFormation,
sqequalReflexivity,
computationStep,
sqequalTransitivity,
sqequalSubstitution
Latex:
\mforall{}[B,f:coSet\{i:l\}]. (imageset(B;f) \mmember{} coSet\{i:l\})
Date html generated:
2018_07_29-AM-10_05_33
Last ObjectModification:
2018_07_18-PM-03_34_59
Theory : constructive!set!theory
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