Nuprl Lemma : loop-class-memory-no-input
∀[Info,B:Type]. ∀[X:EClass(B ⟶ B)]. ∀[init:Id ⟶ bag(B)]. ∀[es:EO+(Info)]. ∀[e:E].
  loop-class-memory(X;init)(e) = Prior(loop-class-memory(X;init))?init(e) ∈ bag(B) 
  supposing (¬↑first(e)) 
⇒ (¬↑pred(e) ∈b X)
Proof
Definitions occuring in Statement : 
loop-class-memory: loop-class-memory(X;init)
, 
primed-class-opt: Prior(X)?b
, 
member-eclass: e ∈b X
, 
class-ap: X(e)
, 
eclass: EClass(A[eo; e])
, 
event-ordering+: EO+(Info)
, 
es-first: first(e)
, 
es-pred: pred(e)
, 
es-E: E
, 
Id: Id
, 
assert: ↑b
, 
uimplies: b supposing a
, 
uall: ∀[x:A]. B[x]
, 
not: ¬A
, 
implies: P 
⇒ Q
, 
function: x:A ⟶ B[x]
, 
universe: Type
, 
equal: s = t ∈ T
, 
bag: bag(T)
Definitions unfolded in proof : 
all: ∀x:A. B[x]
, 
member: t ∈ T
, 
subtype_rel: A ⊆r B
, 
strongwellfounded: SWellFounded(R[x; y])
, 
exists: ∃x:A. B[x]
, 
uall: ∀[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)
, 
not: ¬A
, 
top: Top
, 
and: P ∧ Q
, 
prop: ℙ
, 
guard: {T}
, 
int_seg: {i..j-}
, 
lelt: i ≤ j < k
, 
le: A ≤ B
, 
less_than': less_than'(a;b)
, 
decidable: Dec(P)
, 
or: P ∨ Q
, 
less_than: a < b
, 
squash: ↓T
, 
so_lambda: λ2x y.t[x; y]
, 
so_apply: x[s1;s2]
, 
class-ap: X(e)
, 
loop-class-memory: loop-class-memory(X;init)
, 
so_lambda: λ2x.t[x]
, 
so_apply: x[s]
, 
bool: 𝔹
, 
unit: Unit
, 
it: ⋅
, 
btrue: tt
, 
uiff: uiff(P;Q)
, 
ifthenelse: if b then t else f fi 
, 
bfalse: ff
, 
es-E: E
, 
es-base-E: es-base-E(es)
, 
iff: P 
⇐⇒ Q
, 
rev_implies: P 
⇐ Q
, 
classrel: v ∈ X(e)
, 
rev_uimplies: rev_uimplies(P;Q)
, 
bag-null: bag-null(bs)
Latex:
\mforall{}[Info,B:Type].  \mforall{}[X:EClass(B  {}\mrightarrow{}  B)].  \mforall{}[init:Id  {}\mrightarrow{}  bag(B)].  \mforall{}[es:EO+(Info)].  \mforall{}[e:E].
    loop-class-memory(X;init)(e)  =  Prior(loop-class-memory(X;init))?init(e) 
    supposing  (\mneg{}\muparrow{}first(e))  {}\mRightarrow{}  (\mneg{}\muparrow{}pred(e)  \mmember{}\msubb{}  X)
Date html generated:
2016_05_16-PM-11_40_07
Last ObjectModification:
2016_01_17-PM-07_14_38
Theory : event-ordering
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