Nuprl Lemma : pv11_p1_decision_from_maj_acceptors

Cmd:ValueAllType. ∀f:pv11_p1_headers_type{i:l}(Cmd). ∀es:EO+(Message(f)). ∀e:E. ∀accpts,ldrs:bag(Id).
ldrs_uid:Id ⟶ ℤ. ∀reps:bag(Id). ∀b:pv11_p1_Ballot_Num(). ∀s:ℤ. ∀c:Cmd. ∀i:Id.
  (Inj(Id;ℤ;ldrs_uid)
   pv11_p1_message-constraint{paxos-v11-part1.esh:o}(Cmd; accpts; ldrs; ldrs_uid; reps; f; es)
   0 < #(accpts)
   has-es-info-type(es;e;f;Id × pv11_p1_Ballot_Num() × ℤ × pv11_p1_Ballot_Num())
   (b (snd(snd(snd(msgval(e))))) ∈ pv11_p1_Ballot_Num())
   pv11_p1_decision'send(Cmd;f) i <s, c> ∈ pv11_p1_main(Cmd;accpts;ldrs;ldrs_uid;reps;f)(e)
   (↓∃L:E List
        (#([i∈accpts|¬bi ∈b map(λe.loc(e);L)]) < pv11_p1_threshold(accpts)
        ∧ (∀e':E
             ((e' ∈ L)
              ((e' < e)
                ∧ loc(e') ↓∈ accpts
                ∧ (b (fst(pv11_p1_AcceptorStateFun(Cmd;ldrs_uid;f;es;e'))) ∈ pv11_p1_Ballot_Num())
                ∧ (<b, s, c> ∈ snd(pv11_p1_AcceptorStateFun(Cmd;ldrs_uid;f;es;e')))))))))


Proof




Definitions occuring in Statement :  pv11_p1_decision'send: pv11_p1_decision'send(Cmd;f) pv11_p1_message-constraint: pv11_p1_message-constraint{paxos-v11-part1.esh:o}(Cmd; accpts; ldrs; ldrs_uid; reps; mf; es) pv11_p1_main: pv11_p1_main(Cmd;accpts;ldrs;ldrs_uid;reps;mf) pv11_p1_AcceptorStateFun: pv11_p1_AcceptorStateFun(Cmd;ldrs_uid;mf;es;e) pv11_p1_threshold: pv11_p1_threshold(accpts) pv11_p1_headers_type: pv11_p1_headers_type{i:l}(Cmd) pv11_p1_Ballot_Num: pv11_p1_Ballot_Num() msg-interface: Interface es-info-body: msgval(e) has-es-info-type: has-es-info-type(es;e;f;T) Message: Message(f) classrel: v ∈ X(e) event-ordering+: EO+(Info) es-causl: (e < e') es-loc: loc(e) es-E: E id-deq: IdDeq Id: Id l_member: (x ∈ l) deq-member: x ∈b L map: map(f;as) list: List inject: Inj(A;B;f) vatype: ValueAllType bnot: ¬bb less_than: a < b pi1: fst(t) pi2: snd(t) all: x:A. B[x] exists: x:A. B[x] squash: T implies:  Q and: P ∧ Q apply: a lambda: λx.A[x] function: x:A ⟶ B[x] pair: <a, b> product: x:A × B[x] natural_number: $n int: equal: t ∈ T bag-member: x ↓∈ bs bag-size: #(bs) bag-filter: [x∈b|p[x]] bag: bag(T)
Definitions unfolded in proof :  vatype: ValueAllType all: x:A. B[x] implies:  Q pv11_p1_headers_type: pv11_p1_headers_type{i:l}(Cmd) l_all: (∀x∈L.P[x]) and: P ∧ Q member: t ∈ T uall: [x:A]. B[x] so_lambda: λ2x.t[x] subtype_rel: A ⊆B prop: so_apply: x[s] iff: ⇐⇒ Q listp: List+ name: Name int_seg: {i..j-} lelt: i ≤ j < k le: A ≤ B less_than': less_than'(a;b) false: False not: ¬A less_than: a < b squash: T length: ||as|| list_ind: list_ind pv11_p1_headers: pv11_p1_headers() cons: [a b] nil: [] it: true: True select: L[n] subtract: m uimplies: supposing a guard: {T} rev_implies:  Q pv11_p1_headers_fun: pv11_p1_headers_fun(Cmd) name_eq: name_eq(x;y) name-deq: NameDeq list-deq: list-deq(eq) band: p ∧b q ifthenelse: if then else fi  atom-deq: AtomDeq eq_atom: =a y bfalse: ff btrue: tt null: null(as) has-es-info-type: has-es-info-type(es;e;f;T) pi2: snd(t) nat: pv11_p1_decision'send: pv11_p1_decision'send(Cmd;f) make-Msg: make-Msg(hdr;val) mk-msg-interface: mk-msg-interface(l;m) make-msg-interface: make-msg-interface(i;l;m) mk-msg: mk-msg(auth;hdr;val) exists: x:A. B[x] pv11_p1_p2a'send: pv11_p1_p2a'send(Cmd;f) cand: c∧ B sq_type: SQType(T) pv11_p1_Ballot_Num: pv11_p1_Ballot_Num() Id: Id pi1: fst(t) top: Top

Latex:
\mforall{}Cmd:ValueAllType.  \mforall{}f:pv11\_p1\_headers\_type\{i:l\}(Cmd).  \mforall{}es:EO+(Message(f)).  \mforall{}e:E.
\mforall{}accpts,ldrs:bag(Id).  \mforall{}ldrs$_{uid}$:Id  {}\mrightarrow{}  \mBbbZ{}.  \mforall{}reps:bag(Id).  \mforall{}b:pv11\_p1\_Ballot\_Nu\000Cm().  \mforall{}s:\mBbbZ{}.  \mforall{}c:Cmd.  \mforall{}i:Id.
    (Inj(Id;\mBbbZ{};ldrs$_{uid}$)
    {}\mRightarrow{}  pv11\_p1\_message-constraint\{paxos-v11-part1.esh:o\}(Cmd;  accpts;  ldrs;  ldrs$_{uid\mbackslash{}ff7\000Cd$;  reps;  f;  es)
    {}\mRightarrow{}  0  <  \#(accpts)
    {}\mRightarrow{}  has-es-info-type(es;e;f;Id  \mtimes{}  pv11\_p1\_Ballot\_Num()  \mtimes{}  \mBbbZ{}  \mtimes{}  pv11\_p1\_Ballot\_Num())
    {}\mRightarrow{}  (b  =  (snd(snd(snd(msgval(e))))))
    {}\mRightarrow{}  pv11\_p1\_decision'send(Cmd;f)  i  <s,  c>  \mmember{}  pv11\_p1\_main(Cmd;accpts;ldrs;ldrs$_{uid\mbackslash{}ff7\000Cd$;reps;f)(e)
    {}\mRightarrow{}  (\mdownarrow{}\mexists{}L:E  List
                (\#([i\mmember{}accpts|\mneg{}\msubb{}i  \mmember{}\msubb{}  map(\mlambda{}e.loc(e);L)])  <  pv11\_p1\_threshold(accpts)
                \mwedge{}  (\mforall{}e':E
                          ((e'  \mmember{}  L)
                          {}\mRightarrow{}  ((e'  <  e)
                                \mwedge{}  loc(e')  \mdownarrow{}\mmember{}  accpts
                                \mwedge{}  (b  =  (fst(pv11\_p1\_AcceptorStateFun(Cmd;ldrs$_{uid}$;f;es;e')))\000C)
                                \mwedge{}  (<b,  s,  c>  \mmember{}  snd(pv11\_p1\_AcceptorStateFun(Cmd;ldrs$_{uid}$;f;e\000Cs;e')))))))))



Date html generated: 2016_05_17-PM-04_09_04
Last ObjectModification: 2016_01_18-AM-11_15_33

Theory : paxos!synod


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