{ [A:Type]. [eq:EqDecider(A)]. [f,g:a:A fp-Top]. [x:A]. [z:Top].
    (f  g(x)?z ~ if x  dom(f) then f(x)?z else g(x)?z fi ) }

{ Proof }



Definitions occuring in Statement :  fpf-join: f  g fpf-cap: f(x)?z fpf-dom: x  dom(f) fpf: a:A fp-B[a] ifthenelse: if b then t else f fi  uall: [x:A]. B[x] top: Top universe: Type sqequal: s ~ t deq: EqDecider(T)
Definitions :  top: Top fpf-cap: f(x)?z ifthenelse: if b then t else f fi  member: t  T so_lambda: x.t[x] btrue: tt prop: assert: b all: x:A. B[x] implies: P  Q bfalse: ff bnot: b or: P  Q guard: {T} uall: [x:A]. B[x] bool: so_apply: x[s] unit: Unit iff: P  Q false: False and: P  Q not: A uimplies: b supposing a it:
Lemmas :  fpf-join-ap-sq fpf-dom_wf fpf-join_wf bool_wf assert_wf btrue_wf iff_weakening_uiff true_wf eqtt_to_assert false_wf eqff_to_assert not_wf bnot_wf fpf-join-dom not_functionality_wrt_iff top_wf fpf_wf deq_wf uiff_transitivity assert_of_bnot

\mforall{}[A:Type].  \mforall{}[eq:EqDecider(A)].  \mforall{}[f,g:a:A  fp->  Top].  \mforall{}[x:A].  \mforall{}[z:Top].
    (f  \moplus{}  g(x)?z  \msim{}  if  x  \mmember{}  dom(f)  then  f(x)?z  else  g(x)?z  fi  )


Date html generated: 2011_08_10-AM-07_59_58
Last ObjectModification: 2011_06_18-AM-08_19_16

Home Index