Nuprl Lemma : loop-class-memory-exists-prior
∀[Info,B:Type]. ∀[X:EClass(B ⟶ B)]. ∀[init:Id ⟶ bag(B)]. ∀[es:EO+(Info)]. ∀[e:E].
uiff(0 < #(init loc(e));↓∃v:B. v ∈ Prior(loop-class-memory(X;init))?init(e))
Proof
Definitions occuring in Statement :
loop-class-memory: loop-class-memory(X;init),
primed-class-opt: Prior(X)?b,
classrel: v ∈ X(e),
eclass: EClass(A[eo; e]),
event-ordering+: EO+(Info),
es-loc: loc(e),
es-E: E,
Id: Id,
less_than: a < b,
uiff: uiff(P;Q),
uall: ∀[x:A]. B[x],
exists: ∃x:A. B[x],
squash: ↓T,
apply: f a,
function: x:A ⟶ B[x],
natural_number: $n,
universe: Type,
bag-size: #(bs),
bag: bag(T)
Definitions unfolded in proof :
uall: ∀[x:A]. B[x],
member: t ∈ T,
uiff: uiff(P;Q),
and: P ∧ Q,
uimplies: b supposing a,
squash: ↓T,
prop: ℙ,
subtype_rel: A ⊆r B,
nat: ℕ,
so_lambda: λ2x.t[x],
so_apply: x[s],
so_lambda: λ2x y.t[x; y],
so_apply: x[s1;s2],
all: ∀x:A. B[x],
decidable: Dec(P),
or: P ∨ Q,
exists: ∃x:A. B[x],
rev_uimplies: rev_uimplies(P;Q),
guard: {T},
cand: A c∧ B,
implies: P ⇒ Q,
not: ¬A,
false: False,
es-E: E,
es-base-E: es-base-E(es),
iff: P ⇐⇒ Q,
rev_implies: P ⇐ Q,
es-p-local-pred: es-p-local-pred(es;P),
es-locl: (e <loc e')
Latex:
\mforall{}[Info,B:Type]. \mforall{}[X:EClass(B {}\mrightarrow{} B)]. \mforall{}[init:Id {}\mrightarrow{} bag(B)]. \mforall{}[es:EO+(Info)]. \mforall{}[e:E].
uiff(0 < \#(init loc(e));\mdownarrow{}\mexists{}v:B. v \mmember{} Prior(loop-class-memory(X;init))?init(e))
Date html generated:
2016_05_16-PM-11_38_54
Last ObjectModification:
2016_01_17-PM-07_05_10
Theory : event-ordering
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