fact: Definition vee_nt a u1 v1 u2 v2 r s t := nttyd (vee_fun_data a u1 v1) (vee_fun_data a u2 v2) (fun x : (obsy vee_data) => match x with o1 => r | o2 => s | o3 => t end).
imports: Arith cat_examples cardinal fc_limits