Nuprl Lemma : DVp_Null_wf
∀[x:Unit]. (DVp_Null(x) ∈ C_DVALUEp())
Proof
Definitions occuring in Statement :
DVp_Null: DVp_Null(x),
C_DVALUEp: C_DVALUEp(),
uall: ∀[x:A]. B[x],
unit: Unit,
member: t ∈ T
Definitions unfolded in proof :
uall: ∀[x:A]. B[x],
member: t ∈ T,
C_DVALUEp: C_DVALUEp(),
DVp_Null: DVp_Null(x),
eq_atom: x =a y,
ifthenelse: if b then t else f fi ,
btrue: tt,
prop: ℙ,
subtype_rel: A ⊆r B,
ext-eq: A ≡ B,
and: P ∧ Q,
C_DVALUEpco_size: C_DVALUEpco_size(p),
has-value: (a)↓,
nat: ℕ,
le: A ≤ B,
less_than': less_than'(a;b),
false: False,
not: ¬A,
implies: P ⇒ Q,
all: ∀x:A. B[x],
so_lambda: λ2x.t[x],
so_apply: x[s],
uimplies: b supposing a
Lemmas referenced :
C_DVALUEpco-ext,
ifthenelse_wf,
eq_atom_wf,
unit_wf2,
C_LVALUE_wf,
int_seg_wf,
C_DVALUEpco_wf,
list_wf,
l_member_wf,
false_wf,
le_wf,
nat_wf,
has-value_wf_base,
set_subtype_base,
int_subtype_base,
is-exception_wf,
has-value_wf-partial,
set-value-type,
int-value-type,
C_DVALUEpco_size_wf
Rules used in proof :
sqequalSubstitution,
sqequalTransitivity,
computationStep,
sqequalReflexivity,
isect_memberFormation,
cut,
dependent_set_memberEquality,
lemma_by_obid,
hypothesis,
sqequalRule,
dependent_pairEquality,
tokenEquality,
hypothesisEquality,
thin,
instantiate,
sqequalHypSubstitution,
isectElimination,
universeEquality,
intEquality,
unionEquality,
productEquality,
functionEquality,
atomEquality,
setEquality,
voidEquality,
applyEquality,
productElimination,
natural_numberEquality,
independent_pairFormation,
lambdaFormation,
divergentSqle,
sqleReflexivity,
lambdaEquality,
independent_isectElimination,
because_Cache,
equalityEquality,
equalityTransitivity,
equalitySymmetry,
dependent_functionElimination,
independent_functionElimination
Latex:
\mforall{}[x:Unit]. (DVp\_Null(x) \mmember{} C\_DVALUEp())
Date html generated:
2016_05_16-AM-08_49_11
Last ObjectModification:
2015_12_28-PM-06_55_51
Theory : C-semantics
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