Nuprl Lemma : permute_list-identity
∀[T:Type]. ∀[L:T List]. ((L o λx.x) = L ∈ (T List))
Proof
Definitions occuring in Statement :
permute_list: (L o f),
list: T List,
uall: ∀[x:A]. B[x],
lambda: λx.A[x],
universe: Type,
equal: s = t ∈ T
Definitions unfolded in proof :
uall: ∀[x:A]. B[x],
member: t ∈ T,
uimplies: b supposing a,
top: Top,
all: ∀x:A. B[x],
implies: P ⇒ Q,
squash: ↓T,
prop: ℙ,
nat: ℕ,
int_seg: {i..j-},
lelt: i ≤ j < k,
and: P ∧ Q,
le: A ≤ B,
ge: i ≥ j ,
decidable: Dec(P),
or: P ∨ Q,
satisfiable_int_formula: satisfiable_int_formula(fmla),
exists: ∃x:A. B[x],
false: False,
not: ¬A,
true: True,
subtype_rel: A ⊆r B,
guard: {T},
iff: P ⇐⇒ Q,
rev_implies: P ⇐ Q
Lemmas referenced :
list_extensionality,
permute_list_wf,
int_seg_wf,
length_wf,
permute_list_length,
equal_wf,
squash_wf,
true_wf,
permute_list_select,
lelt_wf,
select_wf,
nat_properties,
decidable__le,
satisfiable-full-omega-tt,
intformand_wf,
intformnot_wf,
intformle_wf,
itermConstant_wf,
itermVar_wf,
int_formula_prop_and_lemma,
int_formula_prop_not_lemma,
int_formula_prop_le_lemma,
int_term_value_constant_lemma,
int_term_value_var_lemma,
int_formula_prop_wf,
iff_weakening_equal,
less_than_wf,
nat_wf,
list_wf
Rules used in proof :
sqequalSubstitution,
sqequalTransitivity,
computationStep,
sqequalReflexivity,
isect_memberFormation,
introduction,
cut,
extract_by_obid,
sqequalHypSubstitution,
isectElimination,
thin,
hypothesisEquality,
cumulativity,
lambdaEquality,
natural_numberEquality,
hypothesis,
independent_isectElimination,
sqequalRule,
isect_memberEquality,
voidElimination,
voidEquality,
lambdaFormation,
applyEquality,
imageElimination,
equalityTransitivity,
equalitySymmetry,
because_Cache,
setElimination,
rename,
dependent_set_memberEquality,
independent_pairFormation,
productElimination,
dependent_functionElimination,
unionElimination,
dependent_pairFormation,
int_eqEquality,
intEquality,
computeAll,
imageMemberEquality,
baseClosed,
universeEquality,
independent_functionElimination,
axiomEquality
Latex:
\mforall{}[T:Type]. \mforall{}[L:T List]. ((L o \mlambda{}x.x) = L)
Date html generated:
2017_04_17-AM-08_09_46
Last ObjectModification:
2017_02_27-PM-04_37_28
Theory : list_1
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