Nuprl Lemma : dlo-eq_wf
dlo-eq() ∈ dl-Obj() ⟶ dl-Obj() ⟶ 𝔹
Proof
Definitions occuring in Statement : 
dlo-eq: dlo-eq(), 
dl-Obj: dl-Obj(), 
bool: 𝔹, 
member: t ∈ T, 
function: x:A ⟶ B[x]
Definitions unfolded in proof : 
dlo-eq: dlo-eq(), 
member: t ∈ T, 
subtype_rel: A ⊆r B, 
uall: ∀[x:A]. B[x], 
all: ∀x:A. B[x], 
or: P ∨ Q, 
uimplies: b supposing a, 
sq_type: SQType(T), 
implies: P ⇒ Q, 
guard: {T}, 
uiff: uiff(P;Q), 
and: P ∧ Q, 
nat: ℕ, 
bfalse: ff, 
band: p ∧b q, 
ifthenelse: if b then t else f fi , 
so_lambda: λ2x.t[x], 
so_apply: x[s], 
so_lambda: so_lambda(x,y,z,w.t[x; y; z; w]), 
so_apply: x[s1;s2;s3;s4], 
so_lambda: λ2x y.t[x; y], 
so_apply: x[s1;s2]
Lemmas referenced : 
dl-Obj_wf, 
bool_wf, 
subtype-TYPE, 
eq_atom_wf, 
dl-kind_wf, 
bool_cases, 
subtype_base_sq, 
bool_subtype_base, 
eqtt_to_assert, 
band_wf, 
btrue_wf, 
assert_of_eq_atom, 
dl-aprog?_wf, 
dl-obj-prog_wf, 
eq_int_wf, 
dl-aprog-1_wf, 
bfalse_wf, 
istype-nat, 
dl-comp?_wf, 
dl-prog-obj_wf, 
dl-comp-1_wf, 
dl-comp-2_wf, 
dl-prog_wf, 
dl-choose?_wf, 
dl-choose-1_wf, 
dl-choose-2_wf, 
dl-iterate?_wf, 
dl-iterate-1_wf, 
dl-test?_wf, 
dl-prop-obj_wf, 
dl-test-1_wf, 
dl-prop_wf, 
dl-aprop?_wf, 
dl-obj-prop_wf, 
dl-aprop-1_wf, 
dl-false?_wf, 
dl-implies?_wf, 
dl-implies-1_wf, 
dl-implies-2_wf, 
dl-and?_wf, 
dl-and-1_wf, 
dl-and-2_wf, 
dl-or?_wf, 
dl-or-1_wf, 
dl-or-2_wf, 
dl-box?_wf, 
dl-box-1_wf, 
dl-box-2_wf, 
dl-diamond?_wf, 
dl-diamond-1_wf, 
dl-diamond-2_wf, 
dl-ind_wf
Rules used in proof : 
sqequalSubstitution, 
sqequalTransitivity, 
computationStep, 
sqequalReflexivity, 
lambdaEquality_alt, 
cut, 
functionEquality, 
introduction, 
extract_by_obid, 
hypothesis, 
applyEquality, 
thin, 
sqequalHypSubstitution, 
sqequalRule, 
universeIsType, 
isectElimination, 
hypothesisEquality, 
because_Cache, 
tokenEquality, 
dependent_functionElimination, 
unionElimination, 
instantiate, 
cumulativity, 
independent_isectElimination, 
equalityTransitivity, 
equalitySymmetry, 
independent_functionElimination, 
productElimination, 
setElimination, 
rename, 
inhabitedIsType, 
functionIsType
Latex:
dlo-eq()  \mmember{}  dl-Obj()  {}\mrightarrow{}  dl-Obj()  {}\mrightarrow{}  \mBbbB{}
 Date html generated: 
2019_10_15-AM-11_42_43
 Last ObjectModification: 
2019_04_04-PM-06_34_58
Theory : dynamic!logic
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