Local Infix "⇡" := nat_join (at level 50, left associativity).Local Notation power := (mscal mult 1).

Theorem Const_diophantine l q c x : 𝔻P l -> 𝔻P q -> 𝔻P c -> 𝔻P x -> 𝔻R (fun v => Const (l v) (q v) (c v) (x v)).