Nuprl Lemma : is-cubical-equiv_wf
∀[X:j⊢]. ∀[T,A:{X ⊢ _}]. ∀[w:{X ⊢ _:(T ⟶ A)}]. X ⊢ IsEquiv(T;A;w)
Proof
Definitions occuring in Statement :
is-cubical-equiv: IsEquiv(T;A;w),
cubical-fun: (A ⟶ B),
cubical-term: {X ⊢ _:A},
cubical-type: {X ⊢ _},
cubical_set: CubicalSet,
uall: ∀[x:A]. B[x],
member: t ∈ T
Definitions unfolded in proof :
uall: ∀[x:A]. B[x],
member: t ∈ T,
is-cubical-equiv: IsEquiv(T;A;w),
subtype_rel: A ⊆r B,
squash: ↓T,
all: ∀x:A. B[x],
true: True
Lemmas referenced :
cubical-pi_wf,
contractible-type_wf,
cube-context-adjoin_wf,
cubical_set_cumulativity-i-j,
cubical-type-cumulativity2,
cubical-fiber_wf,
csm-ap-type_wf,
cc-fst_wf,
csm-ap-term_wf,
cubical-fun_wf,
cubical-term_wf,
csm-cubical-fun,
cc-snd_wf,
cubical-type_wf,
cubical_set_wf
Rules used in proof :
sqequalSubstitution,
sqequalTransitivity,
computationStep,
sqequalReflexivity,
isect_memberFormation_alt,
introduction,
cut,
sqequalRule,
extract_by_obid,
sqequalHypSubstitution,
isectElimination,
thin,
hypothesisEquality,
instantiate,
applyEquality,
hypothesis,
because_Cache,
lambdaEquality_alt,
imageElimination,
dependent_functionElimination,
natural_numberEquality,
imageMemberEquality,
baseClosed,
equalityTransitivity,
equalitySymmetry,
hyp_replacement,
universeIsType,
axiomEquality,
isect_memberEquality_alt,
isectIsTypeImplies,
inhabitedIsType
Latex:
\mforall{}[X:j\mvdash{}]. \mforall{}[T,A:\{X \mvdash{} \_\}]. \mforall{}[w:\{X \mvdash{} \_:(T {}\mrightarrow{} A)\}]. X \mvdash{} IsEquiv(T;A;w)
Date html generated:
2020_05_20-PM-03_25_18
Last ObjectModification:
2020_04_06-PM-06_43_07
Theory : cubical!type!theory
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