Nuprl Lemma : zip-append
∀[A,B:Type]. ∀[xs1:A List]. ∀[ys1:B List]. ∀[xs2:A List]. ∀[ys2:B List].
zip(xs1 @ xs2;ys1 @ ys2) ~ zip(xs1;ys1) @ zip(xs2;ys2) supposing ||xs1|| = ||ys1|| ∈ ℤ
Proof
Definitions occuring in Statement :
zip: zip(as;bs),
length: ||as||,
append: as @ bs,
list: T List,
uimplies: b supposing a,
uall: ∀[x:A]. B[x],
int: ℤ,
universe: Type,
sqequal: s ~ t,
equal: s = t ∈ T
Definitions unfolded in proof :
uall: ∀[x:A]. B[x],
member: t ∈ T,
all: ∀x:A. B[x],
nat: ℕ,
implies: P ⇒ Q,
false: False,
ge: i ≥ j ,
uimplies: b supposing a,
satisfiable_int_formula: satisfiable_int_formula(fmla),
exists: ∃x:A. B[x],
not: ¬A,
top: Top,
and: P ∧ Q,
prop: ℙ,
subtype_rel: A ⊆r B,
guard: {T},
or: P ∨ Q,
append: as @ bs,
so_lambda: so_lambda3,
so_apply: x[s1;s2;s3],
cons: [a / b],
colength: colength(L),
so_lambda: λ2x y.t[x; y],
so_apply: x[s1;s2],
nil: [],
it: ⋅,
so_lambda: λ2x.t[x],
so_apply: x[s],
sq_type: SQType(T),
le: A ≤ B,
decidable: Dec(P),
less_than: a < b,
squash: ↓T,
less_than': less_than'(a;b),
uiff: uiff(P;Q)
Lemmas referenced :
nat_properties,
satisfiable-full-omega-tt,
intformand_wf,
intformle_wf,
itermConstant_wf,
itermVar_wf,
intformless_wf,
int_formula_prop_and_lemma,
int_formula_prop_le_lemma,
int_term_value_constant_lemma,
int_term_value_var_lemma,
int_formula_prop_less_lemma,
int_formula_prop_wf,
ge_wf,
less_than_wf,
equal_wf,
length_wf,
list_wf,
equal-wf-T-base,
nat_wf,
colength_wf_list,
less_than_transitivity1,
less_than_irreflexivity,
list-cases,
equal-wf-base-T,
length_of_nil_lemma,
list_ind_nil_lemma,
zip_nil_lemma,
equal-wf-base,
product_subtype_list,
spread_cons_lemma,
subtype_base_sq,
set_subtype_base,
le_wf,
int_subtype_base,
length_of_cons_lemma,
non_neg_length,
intformeq_wf,
itermAdd_wf,
int_formula_prop_eq_lemma,
int_term_value_add_lemma,
cons_wf,
decidable__le,
intformnot_wf,
int_formula_prop_not_lemma,
subtract_wf,
itermSubtract_wf,
int_term_value_subtract_lemma,
decidable__equal_int,
list_ind_cons_lemma,
zip_cons_cons_lemma,
add-is-int-iff,
false_wf
Rules used in proof :
sqequalSubstitution,
sqequalTransitivity,
computationStep,
sqequalReflexivity,
isect_memberFormation,
introduction,
cut,
thin,
lambdaFormation,
extract_by_obid,
sqequalHypSubstitution,
isectElimination,
hypothesisEquality,
hypothesis,
setElimination,
rename,
intWeakElimination,
natural_numberEquality,
independent_isectElimination,
dependent_pairFormation,
lambdaEquality,
int_eqEquality,
intEquality,
dependent_functionElimination,
isect_memberEquality,
voidElimination,
voidEquality,
sqequalRule,
independent_pairFormation,
computeAll,
independent_functionElimination,
axiomSqEquality,
cumulativity,
equalityTransitivity,
equalitySymmetry,
because_Cache,
applyEquality,
unionElimination,
baseClosed,
promote_hyp,
hypothesis_subsumption,
productElimination,
instantiate,
applyLambdaEquality,
dependent_set_memberEquality,
addEquality,
imageElimination,
pointwiseFunctionality,
baseApply,
closedConclusion,
universeEquality
Latex:
\mforall{}[A,B:Type]. \mforall{}[xs1:A List]. \mforall{}[ys1:B List]. \mforall{}[xs2:A List]. \mforall{}[ys2:B List].
zip(xs1 @ xs2;ys1 @ ys2) \msim{} zip(xs1;ys1) @ zip(xs2;ys2) supposing ||xs1|| = ||ys1||
Date html generated:
2020_05_19-PM-09_49_38
Last ObjectModification:
2020_02_03-AM-11_43_46
Theory : list_1
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