Nuprl Lemma : product-value-type
∀[A:Type]. ∀[B:A ⟶ Type]. value-type(a:A × B[a])
Proof
Definitions occuring in Statement :
value-type: value-type(T),
uall: ∀[x:A]. B[x],
so_apply: x[s],
function: x:A ⟶ B[x],
product: x:A × B[x],
universe: Type
Definitions unfolded in proof :
uall: ∀[x:A]. B[x],
member: t ∈ T,
value-type: value-type(T),
uimplies: b supposing a,
sq_stable: SqStable(P),
implies: P ⇒ Q,
so_apply: x[s],
all: ∀x:A. B[x],
has-value: (a)↓,
prop: ℙ,
squash: ↓T
Lemmas referenced :
sq_stable__has-value,
equal_wf,
equal-wf-base,
base_wf
Rules used in proof :
sqequalSubstitution,
sqequalTransitivity,
computationStep,
sqequalReflexivity,
isect_memberFormation,
introduction,
cut,
extract_by_obid,
sqequalHypSubstitution,
isectElimination,
thin,
hypothesisEquality,
hypothesis,
independent_functionElimination,
equalityTransitivity,
equalitySymmetry,
productEquality,
cumulativity,
applyEquality,
functionExtensionality,
lambdaFormation,
productElimination,
sqequalRule,
sqleReflexivity,
dependent_functionElimination,
imageMemberEquality,
baseClosed,
imageElimination,
because_Cache,
isect_memberEquality,
axiomSqleEquality,
functionEquality,
universeEquality
Latex:
\mforall{}[A:Type]. \mforall{}[B:A {}\mrightarrow{} Type]. value-type(a:A \mtimes{} B[a])
Date html generated:
2017_04_14-AM-07_14_52
Last ObjectModification:
2017_02_27-PM-02_50_18
Theory : call!by!value_1
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