Nuprl Lemma : vr_PEXT_implies_t_eq_f
vr_PEXT 
tt = ff
Proof not projected
Definitions occuring in Statement :
vr_PEXT: vr_PEXT,
bfalse: ff,
btrue: tt,
bool: 
,
implies: P Q,
equal: s = t
Definitions :
CollapseTHENA: Error :CollapseTHENA,
Auto: Error :Auto,
implies: P Q,
vr_PEXT: vr_PEXT,
all: 
x:A. B[x],
function: x:A 
B[x],
member: t 
T,
equal: s = t,
CollapseTHEN: Error :CollapseTHEN,
bool: ,
MaAuto: Error :MaAuto,
D: Error :D,
universe: Type,
pair: <a, b>,
prop: 
,
product: x:A 
B[x],
exists: 
x:A. B[x],
union: left + right,
unit: Unit,
uall: [x:A]. B[x],
isect: 
x:A. B[x],
subtype_rel: A 
r B,
uiff: uiff(P;Q),
and: P 
Q,
uimplies: b supposing a,
less_than: a < b,
not: 
A,
ge: i 
j ,
le: A 
B,
strong-subtype: strong-subtype(A;B),
vr_BOOLDI: vr_BOOLDI,
lambda: 
x.A[x],
bnot: 
b,
apply: f a,
limited-type: LimitedType,
inl: inl x ,
it: 
,
sq_type: SQType(T),
guard: {T},
iff: P 
Q,
rev_implies: P Q,
squash: 
T,
true: True,
btrue: tt,
bfalse: ff,
false: False,
inr: inr x
Lemmas :
btrue_wf,
bfalse_wf,
btrue_neq_bfalse,
true_wf,
squash_wf,
rev_implies_wf,
iff_wf,
unit_subtype_base,
subtype_base_sq,
unit_triviality,
bnot_wf,
vr_BOOLDI_r,
bool-inhabited,
unit_wf,
bool_wf,
vr_PEXT_implies_fixpoint,
vr_PEXT_wf
vr\_PEXT {}\mRightarrow{} tt = ff
Date html generated:
2012_02_20-PM-03_34_23
Last ObjectModification:
2012_02_02-PM-01_55_32
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