Nuprl Lemma : or-latest-val
∀[Info:Type]. ∀[es:EO+(Info)]. ∀[A,B:Type]. ∀[X:EClass(A)]. ∀[Y:EClass(B)]. ∀[e:E].
  (X |- Y)(e) = ((X)- | (Y)-)(e) ∈ one_or_both(A;B) supposing (↑e ∈b (X |- Y)) ∧ Singlevalued(X) ∧ Singlevalued(Y)
Proof
Definitions occuring in Statement : 
es-or-latest: (X |- Y)
, 
es-latest-val: (X)-
, 
es-interface-or: (X | Y)
, 
sv-class: Singlevalued(X)
, 
eclass-val: X(e)
, 
in-eclass: e ∈b X
, 
eclass: EClass(A[eo; e])
, 
event-ordering+: EO+(Info)
, 
es-E: E
, 
assert: ↑b
, 
uimplies: b supposing a
, 
uall: ∀[x:A]. B[x]
, 
and: P ∧ Q
, 
universe: Type
, 
equal: s = t ∈ T
, 
one_or_both: one_or_both(A;B)
Lemmas : 
is-or-latest, 
assert_wf, 
in-eclass_wf, 
es-or-latest_wf, 
es-interface-subtype_rel2, 
es-E_wf, 
event-ordering+_subtype, 
top_wf, 
subtype_top, 
one_or_both_wf, 
sv-class_wf, 
eclass_wf, 
event-ordering+_wf, 
bool_wf, 
eqtt_to_assert, 
bag_size_single_lemma, 
bag_only_single_lemma, 
oobboth_wf, 
eclass-val_wf, 
eqff_to_assert, 
equal_wf, 
bool_cases_sqequal, 
subtype_base_sq, 
bool_subtype_base, 
assert-bnot, 
bag_size_empty_lemma, 
primed-class_wf, 
oobleft_wf, 
squash_wf, 
true_wf, 
event-ordering+_cumulative2, 
primed-class-prior-val, 
es-prior-val_wf, 
iff_weakening_equal, 
not_assert_elim, 
and_wf, 
assert_elim, 
btrue_neq_bfalse, 
oobright_wf
Latex:
\mforall{}[Info:Type].  \mforall{}[es:EO+(Info)].  \mforall{}[A,B:Type].  \mforall{}[X:EClass(A)].  \mforall{}[Y:EClass(B)].  \mforall{}[e:E].
    (X  |\msupminus{}  Y)(e)  =  ((X)\msupminus{}  |  (Y)\msupminus{})(e)  supposing  (\muparrow{}e  \mmember{}\msubb{}  (X  |\msupminus{}  Y))  \mwedge{}  Singlevalued(X)  \mwedge{}  Singlevalued(Y)
Date html generated:
2015_07_21-PM-04_21_56
Last ObjectModification:
2015_02_04-PM-06_07_50
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