Is Query Bound P lift Comp sub Spec
OracleComp.IsQueryBoundP.liftComp_subSpec
Plain-language statement
Predicate-targeted query bounds are preserved by lifting along a SubSpec when the target predicate agrees with the source predicate on lifted queries. No LawfulSubSpec assumption is needed: query bounds only inspect query indices, not the distribution of responses.
Exact Lean statement
theorem IsQueryBoundP.liftComp_subSpec
[h : spec ⊂ₒ superSpec]
{oa : OracleComp spec α}
{p : spec.Domain → Prop} [DecidablePred p]
{q : superSpec.Domain → Prop} [DecidablePred q]
{n : ℕ}
(hpq : ∀ t, p t ↔ q (h.onQuery t))
(hoa : oa.IsQueryBoundP p n) :
(liftComp oa superSpec).IsQueryBoundP q nFormal artifact
Lean source
theorem IsQueryBoundP.liftComp_subSpec [h : spec ⊂ₒ superSpec] {oa : OracleComp spec α} {p : spec.Domain → Prop} [DecidablePred p] {q : superSpec.Domain → Prop} [DecidablePred q] {n : ℕ} (hpq : ∀ t, p t ↔ q (h.onQuery t)) (hoa : oa.IsQueryBoundP p n) : (liftComp oa superSpec).IsQueryBoundP q n := by induction oa using OracleComp.inductionOn generalizing n with | pure x => simp | query_bind t mx ih => rw [isQueryBoundP_query_bind_iff] at hoa rw [liftComp_bind, liftComp_query] change IsQueryBoundP ((liftM (spec.query t) : OracleComp superSpec (spec.Range t)) >>= fun u => liftComp (mx u) superSpec) q n rw [show (liftM (spec.query t) : OracleComp superSpec (spec.Range t)) = liftM (superSpec.query (h.onQuery t)) >>= fun u => pure (h.onResponse t u) by change ((liftM (spec.query t) : OracleQuery superSpec (spec.Range t)) : OracleComp superSpec (spec.Range t)) = (liftM (superSpec.query (h.onQuery t)) >>= fun u => pure (h.onResponse t u)) rw [show (liftM (spec.query t) : OracleQuery superSpec (spec.Range t)) = ⟨h.onQuery t, h.onResponse t⟩ from h.liftM_eq_lift _] rfl] rw [bind_assoc, isQueryBoundP_query_bind_iff] refine ⟨by simpa [← hpq t] using hoa.1, fun u => ?_⟩ rw [pure_bind] have hcont := ih (h.onResponse t u) (hoa.2 (h.onResponse t u)) by_cases hp : p t · simpa [hp, (hpq t).1 hp] using hcont · simpa [hp, mt (hpq t).2 hp] using hcont- Project
- VCVio
- License
- Apache-2.0
- Commit
- 2ceb2d825ee3
- Source
- VCVio/OracleComp/QueryTracking/SubSpec.lean:31-66
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