Nuprl Lemma : C_TYPE-induction2
∀[P:C_TYPE() ⟶ ℙ]
  (P[C_Void()]
  
⇒ P[C_Int()]
  
⇒ (∀fields:(Atom × C_TYPE()) List. ((∀i:ℕ||fields||. P[snd(fields[i])]) 
⇒ P[C_Struct(fields)]))
  
⇒ (∀length:ℕ. ∀elems:C_TYPE().  (P[elems] 
⇒ P[C_Array(length;elems)]))
  
⇒ (∀to:C_TYPE(). (P[to] 
⇒ P[C_Pointer(to)]))
  
⇒ {∀x:C_TYPE(). P[x]})
Proof
Definitions occuring in Statement : 
C_Pointer: C_Pointer(to)
, 
C_Array: C_Array(length;elems)
, 
C_Struct: C_Struct(fields)
, 
C_Int: C_Int()
, 
C_Void: C_Void()
, 
C_TYPE: C_TYPE()
, 
select: L[n]
, 
length: ||as||
, 
list: T List
, 
int_seg: {i..j-}
, 
nat: ℕ
, 
uall: ∀[x:A]. B[x]
, 
prop: ℙ
, 
guard: {T}
, 
so_apply: x[s]
, 
pi2: snd(t)
, 
all: ∀x:A. B[x]
, 
implies: P 
⇒ Q
, 
function: x:A ⟶ B[x]
, 
product: x:A × B[x]
, 
natural_number: $n
, 
atom: Atom
Definitions unfolded in proof : 
uall: ∀[x:A]. B[x]
, 
member: t ∈ T
, 
implies: P 
⇒ Q
, 
all: ∀x:A. B[x]
, 
prop: ℙ
, 
so_lambda: λ2x.t[x]
, 
so_apply: x[s]
, 
int_seg: {i..j-}
, 
uimplies: b supposing a
, 
guard: {T}
, 
lelt: i ≤ j < k
, 
and: P ∧ Q
, 
decidable: Dec(P)
, 
or: P ∨ Q
, 
satisfiable_int_formula: satisfiable_int_formula(fmla)
, 
exists: ∃x:A. B[x]
, 
false: False
, 
not: ¬A
, 
top: Top
, 
less_than: a < b
, 
squash: ↓T
, 
subtype_rel: A ⊆r B
, 
l_all: (∀x∈L.P[x])
, 
pi2: snd(t)
Lemmas referenced : 
C_Void_wf, 
C_Int_wf, 
C_Struct_wf, 
pi2_wf, 
int_formula_prop_less_lemma, 
intformless_wf, 
decidable__lt, 
int_formula_prop_wf, 
int_term_value_var_lemma, 
int_term_value_constant_lemma, 
int_formula_prop_le_lemma, 
int_formula_prop_not_lemma, 
int_formula_prop_and_lemma, 
itermVar_wf, 
itermConstant_wf, 
intformle_wf, 
intformnot_wf, 
intformand_wf, 
satisfiable-full-omega-tt, 
decidable__le, 
int_seg_properties, 
select_wf, 
length_wf, 
int_seg_wf, 
all_wf, 
list_wf, 
l_member_wf, 
C_TYPE_wf, 
l_all_wf2, 
C_TYPE-induction
Rules used in proof : 
cut, 
lemma_by_obid, 
sqequalSubstitution, 
sqequalTransitivity, 
computationStep, 
sqequalReflexivity, 
isect_memberFormation, 
hypothesis, 
sqequalHypSubstitution, 
isectElimination, 
thin, 
hypothesisEquality, 
lambdaFormation, 
independent_functionElimination, 
dependent_functionElimination, 
productEquality, 
atomEquality, 
sqequalRule, 
lambdaEquality, 
spreadEquality, 
setElimination, 
rename, 
applyEquality, 
setEquality, 
functionEquality, 
natural_numberEquality, 
because_Cache, 
independent_isectElimination, 
productElimination, 
unionElimination, 
dependent_pairFormation, 
int_eqEquality, 
intEquality, 
isect_memberEquality, 
voidElimination, 
voidEquality, 
independent_pairFormation, 
computeAll, 
imageElimination, 
equalityEquality, 
equalityTransitivity, 
equalitySymmetry, 
universeEquality, 
cumulativity
Latex:
\mforall{}[P:C\_TYPE()  {}\mrightarrow{}  \mBbbP{}]
    (P[C\_Void()]
    {}\mRightarrow{}  P[C\_Int()]
    {}\mRightarrow{}  (\mforall{}fields:(Atom  \mtimes{}  C\_TYPE())  List.  ((\mforall{}i:\mBbbN{}||fields||.  P[snd(fields[i])])  {}\mRightarrow{}  P[C\_Struct(fields)]))
    {}\mRightarrow{}  (\mforall{}length:\mBbbN{}.  \mforall{}elems:C\_TYPE().    (P[elems]  {}\mRightarrow{}  P[C\_Array(length;elems)]))
    {}\mRightarrow{}  (\mforall{}to:C\_TYPE().  (P[to]  {}\mRightarrow{}  P[C\_Pointer(to)]))
    {}\mRightarrow{}  \{\mforall{}x:C\_TYPE().  P[x]\})
Date html generated:
2016_05_16-AM-08_46_04
Last ObjectModification:
2016_01_17-AM-09_43_10
Theory : C-semantics
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