Nuprl Lemma : hdf-compose1-transformation1-2
∀[f,L,G:Base]. ∀[m:ℕ].
(f o fix((λmk-hdf.(inl (λa.cbva_seq(L[a]; λg.<mk-hdf, G[a;g]>; m)))))
~ fix((λmk-hdf.(inl (λa.cbva_seq(λn.if (n =z m) then mk_lambdas_fun(λg.bag-map(f;G[a;g]);m) else L[a] n fi ;
λg.<mk-hdf, select_fun_ap(g;m + 1;m)>; m + 1))))))
Proof
Definitions occuring in Statement :
hdf-compose1: f o X,
nat: ℕ,
ifthenelse: if b then t else f fi ,
eq_int: (i =z j),
uall: ∀[x:A]. B[x],
so_apply: x[s1;s2],
so_apply: x[s],
apply: f a,
fix: fix(F),
lambda: λx.A[x],
pair: <a, b>,
inl: inl x,
add: n + m,
natural_number: $n,
base: Base,
sqequal: s ~ t,
bag-map: bag-map(f;bs),
select_fun_ap: select_fun_ap(g;n;m),
mk_lambdas_fun: mk_lambdas_fun(F;m),
cbva_seq: cbva_seq(L; F; m)
Definitions unfolded in proof :
uall: ∀[x:A]. B[x],
member: t ∈ T,
so_apply: x[s],
so_apply: x[s1;s2],
eq_int: (i =z j),
ifthenelse: if b then t else f fi ,
hdf-compose1: f o X,
bfalse: ff,
btrue: tt,
hdf-halted: hdf-halted(P),
hdf-ap: X(a),
mk-hdf: mk-hdf(s,m.G[s; m];st.H[st];s0),
hdf-run: hdf-run(P),
hdf-halt: hdf-halt(),
isr: isr(x),
so_lambda: so_lambda(x,y,z,w.t[x; y; z; w]),
so_apply: x[s1;s2;s3;s4],
so_lambda: λ2x.t[x],
top: Top,
uimplies: b supposing a,
strict4: strict4(F),
and: P ∧ Q,
all: ∀x:A. B[x],
implies: P ⇒ Q,
has-value: (a)↓,
prop: ℙ,
guard: {T},
or: P ∨ Q,
squash: ↓T,
so_lambda: λ2x y.t[x; y],
int_seg: {i..j-},
lelt: i ≤ j < k,
satisfiable_int_formula: satisfiable_int_formula(fmla),
exists: ∃x:A. B[x],
false: False,
not: ¬A,
decidable: Dec(P),
subtype_rel: A ⊆r B,
le: A ≤ B,
less_than': less_than'(a;b),
nat: ℕ,
ge: i ≥ j ,
sq_type: SQType(T)
Latex:
\mforall{}[f,L,G:Base]. \mforall{}[m:\mBbbN{}].
(f o fix((\mlambda{}mk-hdf.(inl (\mlambda{}a.cbva\_seq(L[a]; \mlambda{}g.<mk-hdf, G[a;g]> m)))))
\msim{} fix((\mlambda{}mk-hdf.(inl (\mlambda{}a.cbva\_seq(\mlambda{}n.if (n =\msubz{} m)
then mk\_lambdas\_fun(\mlambda{}g.bag-map(f;G[a;g]);m)
else L[a] n
fi ; \mlambda{}g.<mk-hdf, select\_fun\_ap(g;m + 1;m)> m + 1))))))
Date html generated:
2016_05_16-AM-10_45_57
Last ObjectModification:
2016_01_17-AM-11_10_46
Theory : halting!dataflow
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