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Step * 1 1 1 2 1 1 of Lemma cs-ref-map3-predecided


1. V : Type
2. L : consensus-state3(V) List@i
3. v : V@i
4. ∀[v':V]. v' = v ∈ V supposing (CONSIDERING[v'] ∈ L) ∨ (COMMITED[v'] ∈ L) 
   supposing (CONSIDERING[v] ∈ L) ∨ (COMMITED[v] ∈ L)
5. ∀v:V. ((COMMITED[v] ∈ L) ⇐⇒ cs-ref-map3(L) = Decided[v] ∈ consensus-state2(V))
6. ∀v':V. (¬(COMMITED[v'] ∈ L))@i
7. (CONSIDERING[v] ∈ L)@i
8. filter(λx.cs-is-considering(x);L) ∈ {x:consensus-state3(V)| ↑((λx.cs-is-considering(x)) x)}  List
9. u : {x:consensus-state3(V)| ↑((λx.cs-is-considering(x)) x)} 
10. v2 : {x:consensus-state3(V)| ↑((λx.cs-is-considering(x)) x)}  List
11. filter(λx.cs-is-considering(x);L) = [u / v2] ∈ ({x:consensus-state3(V)| ↑((λx.cs-is-considering(x)) x)}  List)@i
12. ¬([u / v2] = [] ∈ (consensus-state3(V) List))@i
⊢ cs-considered-val(u) = v ∈ V
BY
{ (BackThruSomeHyp THEN OrLeft THEN Auto) }

1
1. V : Type
2. L : consensus-state3(V) List@i
3. v : V@i
4. ∀[v':V]. v' = v ∈ V supposing (CONSIDERING[v'] ∈ L) ∨ (COMMITED[v'] ∈ L) 
   supposing (CONSIDERING[v] ∈ L) ∨ (COMMITED[v] ∈ L)
5. ∀v:V. ((COMMITED[v] ∈ L) ⇐⇒ cs-ref-map3(L) = Decided[v] ∈ consensus-state2(V))
6. ∀v':V. (¬(COMMITED[v'] ∈ L))@i
7. (CONSIDERING[v] ∈ L)@i
8. filter(λx.cs-is-considering(x);L) ∈ {x:consensus-state3(V)| ↑((λx.cs-is-considering(x)) x)}  List
9. u : {x:consensus-state3(V)| ↑((λx.cs-is-considering(x)) x)} 
10. v2 : {x:consensus-state3(V)| ↑((λx.cs-is-considering(x)) x)}  List
11. filter(λx.cs-is-considering(x);L) = [u / v2] ∈ ({x:consensus-state3(V)| ↑((λx.cs-is-considering(x)) x)}  List)@i
12. ¬([u / v2] = [] ∈ (consensus-state3(V) List))@i
⊢ (CONSIDERING[cs-considered-val(u)] ∈ L)

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Latex:



1.  V  :  Type
2.  L  :  consensus-state3(V)  List@i
3.  v  :  V@i
4.  \mforall{}[v':V].  v'  =  v  supposing  (CONSIDERING[v']  \mmember{}  L)  \mvee{}  (COMMITED[v']  \mmember{}  L) 
      supposing  (CONSIDERING[v]  \mmember{}  L)  \mvee{}  (COMMITED[v]  \mmember{}  L)
5.  \mforall{}v:V.  ((COMMITED[v]  \mmember{}  L)  \mLeftarrow{}{}\mRightarrow{}  cs-ref-map3(L)  =  Decided[v])
6.  \mforall{}v':V.  (\mneg{}(COMMITED[v']  \mmember{}  L))@i
7.  (CONSIDERING[v]  \mmember{}  L)@i
8.  filter(\mlambda{}x.cs-is-considering(x);L)  \mmember{}  \{x:consensus-state3(V)|  \muparrow{}((\mlambda{}x.cs-is-considering(x))  x)\}    List
9.  u  :  \{x:consensus-state3(V)|  \muparrow{}((\mlambda{}x.cs-is-considering(x))  x)\} 
10.  v2  :  \{x:consensus-state3(V)|  \muparrow{}((\mlambda{}x.cs-is-considering(x))  x)\}    List
11.  filter(\mlambda{}x.cs-is-considering(x);L)  =  [u  /  v2]@i
12.  \mneg{}([u  /  v2]  =  [])@i
\mvdash{}  cs-considered-val(u)  =  v


By

(BackThruSomeHyp  THEN  OrLeft  THEN  Auto)

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