Nuprl Lemma : cat-isomorphic_wf
∀[C:SmallCategory]. ∀[x,y:cat-ob(C)]. (cat-isomorphic(C;x;y) ∈ ℙ)
Proof
Definitions occuring in Statement :
cat-isomorphic: cat-isomorphic(C;x;y),
cat-ob: cat-ob(C),
small-category: SmallCategory,
uall: ∀[x:A]. B[x],
prop: ℙ,
member: t ∈ T
Definitions unfolded in proof :
uall: ∀[x:A]. B[x],
member: t ∈ T,
cat-isomorphic: cat-isomorphic(C;x;y),
so_lambda: λ2x.t[x],
so_apply: x[s]
Lemmas referenced :
exists_wf,
cat-arrow_wf,
cat-isomorphism_wf,
cat-ob_wf,
small-category_wf
Rules used in proof :
sqequalSubstitution,
sqequalTransitivity,
computationStep,
sqequalReflexivity,
isect_memberFormation,
introduction,
cut,
sqequalRule,
extract_by_obid,
sqequalHypSubstitution,
isectElimination,
thin,
applyEquality,
hypothesisEquality,
hypothesis,
lambdaEquality,
axiomEquality,
equalityTransitivity,
equalitySymmetry,
isect_memberEquality,
because_Cache
Latex:
\mforall{}[C:SmallCategory]. \mforall{}[x,y:cat-ob(C)]. (cat-isomorphic(C;x;y) \mmember{} \mBbbP{})
Date html generated:
2020_05_20-AM-07_50_14
Last ObjectModification:
2017_01_08-PM-01_07_56
Theory : small!categories
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