Nuprl Lemma : RankEx2_LeafT_wf
∀[S,T:Type]. ∀[leaft:T].  (RankEx2_LeafT(leaft) ∈ RankEx2(S;T))
Proof
Definitions occuring in Statement : 
RankEx2_LeafT: RankEx2_LeafT(leaft), 
RankEx2: RankEx2(S;T), 
uall: ∀[x:A]. B[x], 
member: t ∈ T, 
universe: Type
Definitions unfolded in proof : 
uall: ∀[x:A]. B[x], 
member: t ∈ T, 
RankEx2: RankEx2(S;T), 
RankEx2_LeafT: RankEx2_LeafT(leaft), 
eq_atom: x =a y, 
ifthenelse: if b then t else f fi , 
btrue: tt, 
all: ∀x:A. B[x], 
implies: P ⇒ Q, 
bool: 𝔹, 
unit: Unit, 
it: ⋅, 
bfalse: ff, 
uiff: uiff(P;Q), 
and: P ∧ Q, 
uimplies: b supposing a, 
exists: ∃x:A. B[x], 
prop: ℙ, 
or: P ∨ Q, 
sq_type: SQType(T), 
guard: {T}, 
bnot: ¬bb, 
assert: ↑b, 
false: False, 
subtype_rel: A ⊆r B, 
ext-eq: A ≡ B, 
RankEx2co_size: RankEx2co_size(p), 
has-value: (a)↓, 
nat: ℕ, 
le: A ≤ B, 
less_than': less_than'(a;b), 
not: ¬A, 
so_lambda: λ2x.t[x], 
so_apply: x[s]
Lemmas referenced : 
RankEx2co-ext, 
eq_atom_wf, 
bool_wf, 
eqff_to_assert, 
equal_wf, 
bool_cases_sqequal, 
subtype_base_sq, 
bool_subtype_base, 
assert-bnot, 
neg_assert_of_eq_atom, 
eqtt_to_assert, 
assert_of_eq_atom, 
RankEx2co_wf, 
list_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, 
RankEx2co_size_wf
Rules used in proof : 
sqequalSubstitution, 
sqequalTransitivity, 
computationStep, 
sqequalReflexivity, 
isect_memberFormation, 
cut, 
dependent_set_memberEquality, 
lemma_by_obid, 
hypothesis, 
sqequalHypSubstitution, 
isectElimination, 
thin, 
hypothesisEquality, 
because_Cache, 
sqequalRule, 
dependent_pairEquality, 
tokenEquality, 
lambdaFormation, 
unionElimination, 
equalityElimination, 
productElimination, 
independent_isectElimination, 
equalityTransitivity, 
equalitySymmetry, 
dependent_pairFormation, 
promote_hyp, 
dependent_functionElimination, 
instantiate, 
cumulativity, 
independent_functionElimination, 
voidElimination, 
productEquality, 
unionEquality, 
voidEquality, 
equalityEquality, 
applyEquality, 
natural_numberEquality, 
independent_pairFormation, 
divergentSqle, 
sqleReflexivity, 
intEquality, 
lambdaEquality, 
universeEquality
Latex:
\mforall{}[S,T:Type].  \mforall{}[leaft:T].    (RankEx2\_LeafT(leaft)  \mmember{}  RankEx2(S;T))
 Date html generated: 
2016_05_16-AM-08_59_49
 Last ObjectModification: 
2015_12_28-PM-06_51_38
Theory : C-semantics
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