Nuprl Lemma : functor-presheaf_wf
∀[C,D:SmallCategory].  ∀F:Functor(C;D). ∀P:Presheaf(D).  (functor-presheaf(F;P) ∈ Presheaf(C))
Proof
Definitions occuring in Statement : 
functor-presheaf: functor-presheaf(F;P)
, 
presheaf: Presheaf(C)
, 
cat-functor: Functor(C1;C2)
, 
small-category: SmallCategory
, 
uall: ∀[x:A]. B[x]
, 
all: ∀x:A. B[x]
, 
member: t ∈ T
Definitions unfolded in proof : 
subtype_rel: A ⊆r B
, 
functor-presheaf: functor-presheaf(F;P)
, 
presheaf: Presheaf(C)
, 
all: ∀x:A. B[x]
, 
member: t ∈ T
, 
uall: ∀[x:A]. B[x]
Lemmas referenced : 
small-category_wf, 
cat-functor_wf, 
presheaf_wf, 
op-functor_wf, 
type-cat_wf, 
small-category-subtype, 
op-cat_wf, 
functor-comp_wf
Rules used in proof : 
isect_memberEquality, 
equalitySymmetry, 
equalityTransitivity, 
axiomEquality, 
dependent_functionElimination, 
lambdaEquality, 
because_Cache, 
sqequalRule, 
hypothesis, 
applyEquality, 
hypothesisEquality, 
isectElimination, 
extract_by_obid, 
instantiate, 
thin, 
sqequalHypSubstitution, 
lambdaFormation, 
cut, 
introduction, 
isect_memberFormation, 
sqequalReflexivity, 
computationStep, 
sqequalTransitivity, 
sqequalSubstitution
Latex:
\mforall{}[C,D:SmallCategory].    \mforall{}F:Functor(C;D).  \mforall{}P:Presheaf(D).    (functor-presheaf(F;P)  \mmember{}  Presheaf(C))
Date html generated:
2017_10_05-PM-03_34_10
Last ObjectModification:
2017_10_05-AM-11_37_40
Theory : small!categories
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