{ [A:Type]. [B:A  Type].
    eq:EqDecider(A). f,g:a:A fp-B[a]. x:A.
      (x  dom(f  g)  (x  dom(f))  (x  dom(g))) }

{ Proof }



Definitions occuring in Statement :  fpf-join: f  g fpf-dom: x  dom(f) fpf: a:A fp-B[a] assert: b uall: [x:A]. B[x] so_apply: x[s] all: x:A. B[x] iff: P  Q or: P  Q function: x:A  B[x] universe: Type deq: EqDecider(T)
Definitions :  member: t  T prop: or: P  Q bnot: b and: P  Q assert: b all: x:A. B[x] implies: P  Q btrue: tt ifthenelse: if b then t else f fi  bfalse: ff so_apply: x[s] iff: P  Q rev_implies: P  Q top: Top subtype: S  T true: True guard: {T} uall: [x:A]. B[x] bool: unit: Unit uimplies: b supposing a not: A false: False it:
Lemmas :  assert_wf bnot_wf deq-member_wf bool_wf iff_transitivity iff_weakening_uiff eqtt_to_assert assert-deq-member not_wf eqff_to_assert assert_of_bnot not_functionality_wrt_iff l_member_wf pi1_wf_top false_wf true_wf

\mforall{}[A:Type].  \mforall{}[B:A  {}\mrightarrow{}  Type].
    \mforall{}eq:EqDecider(A).  \mforall{}f,g:a:A  fp->  B[a].  \mforall{}x:A.    (\muparrow{}x  \mmember{}  dom(f  \moplus{}  g)  \mLeftarrow{}{}\mRightarrow{}  (\muparrow{}x  \mmember{}  dom(f))  \mvee{}  (\muparrow{}x  \mmember{}  dom(g)))


Date html generated: 2011_08_10-AM-07_59_21
Last ObjectModification: 2011_06_18-AM-08_18_54

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