English
Under decidable LT and WellFoundedGT assumptions, there exists an estimator for fst of a.prod b.
Русский
При допущении decidable LT и WellFoundedGT существует оцениватель для fst от a.prod b.
LaTeX
$$instEstimatorDataFstProdOfDecidableLTOfWellFoundedGTSubtypeProdLe$$
Lean4
/-- Pop a `β` off the `MLList m β` with lowest priority.
-/
def pop (q : BestFirstQueue prio ε m β maxSize) : m (Option ((α × β) × BestFirstQueue prio ε m β maxSize)) := do
match ← q.popWithBound with
| none =>
pure none
| some (⟨a, _, b⟩, q') =>
pure (some ((a, b), q'))