{ es:EO
    [P1,P2,Q1,Q2:E  ].
      f:{e:E| P1 e}   {e:E| Q1 e} 
        (P1  P2  Q1  Q2  (Q1 = f== P1  Q2 = f== P2)) }

{ Proof }



Definitions occuring in Statement :  weak-antecedent-surjection: Q = f== P es-E: E event_ordering: EO uall: [x:A]. B[x] prop: all: x:A. B[x] iff: P  Q implies: P  Q set: {x:A| B[x]}  apply: f a function: x:A  B[x] predicate_equivalent: P1  P2
Definitions :  all: x:A. B[x] uall: [x:A]. B[x] prop: implies: P  Q predicate_equivalent: P1  P2 iff: P  Q weak-antecedent-surjection: Q = f== P and: P  Q rev_implies: P  Q weak-antecedent-function: Q ==f== P exists: x:A. B[x] member: t  T subtype: S  T suptype: suptype(S; T) cand: A c B guard: {T}
Lemmas :  weak-antecedent-surjection_wf es-E_wf iff_wf event_ordering_wf

\mforall{}es:EO
    \mforall{}[P1,P2,Q1,Q2:E  {}\mrightarrow{}  \mBbbP{}].
        \mforall{}f:\{e:E|  P1  e\}    {}\mrightarrow{}  \{e:E|  Q1  e\}  .  (P1  \mLeftarrow{}{}\mRightarrow{}  P2  {}\mRightarrow{}  Q1  \mLeftarrow{}{}\mRightarrow{}  Q2  {}\mRightarrow{}  (Q1  \mleftarrow{}\mleftarrow{}=  f==  P1  \mLeftarrow{}{}\mRightarrow{}  Q2  \mleftarrow{}\mleftarrow{}=  f==  P2))


Date html generated: 2011_08_16-AM-11_07_12
Last ObjectModification: 2011_06_18-AM-09_40_35

Home Index