(* function splice *)
Definition fsplice A B1 B2 (f1 : A -> B1) (f2 : A -> B2) := 
  fun x : A => (f1 x, f2 x).Notation "[ 'fs' f1 , f2 ]" := (fsplice f1 f2) 
  (at level 0, format "[ 'fs'  f1 ,  f2 ]").(* composing relation and function *)
(* should i turn relations into functions on products? *)
(* then i won't need the next definition *)
(* it will be described using composition and splicing *)

Definition relfuncomp A B (D : rel A) (f : B -> A) : rel B := 
  fun x y => D (f x) (f y).Notation "D \\o f" := (@relfuncomp _ _ D f) (at level 42, left associativity).Inductive and6 (P1 P2 P3 P4 P5 P6 : Prop) : Prop :=
  And6 of P1 & P2 & P3 & P4 & P5 & P6.Inductive and6 (P1 P2 P3 P4 P5 P6 : Prop) : Prop :=
  And6 of P1 & P2 & P3 & P4 & P5 & P6.Inductive and7 (P1 P2 P3 P4 P5 P6 P7 : Prop) : Prop :=
  And7 of P1 & P2 & P3 & P4 & P5 & P6 & P7.Inductive and7 (P1 P2 P3 P4 P5 P6 P7 : Prop) : Prop :=
  And7 of P1 & P2 & P3 & P4 & P5 & P6 & P7.Inductive or5 (P1 P2 P3 P4 P5 : Prop) : Prop :=
  Or51 of P1 | Or52 of P2 | Or53 of P3 | Or54 of P4 | Or55 of P5.Inductive or5 (P1 P2 P3 P4 P5 : Prop) : Prop :=
  Or51 of P1 | Or52 of P2 | Or53 of P3 | Or54 of P4 | Or55 of P5.Inductive or5 (P1 P2 P3 P4 P5 : Prop) : Prop :=
  Or51 of P1 | Or52 of P2 | Or53 of P3 | Or54 of P4 | Or55 of P5.Inductive or5 (P1 P2 P3 P4 P5 : Prop) : Prop :=
  Or51 of P1 | Or52 of P2 | Or53 of P3 | Or54 of P4 | Or55 of P5.Inductive or5 (P1 P2 P3 P4 P5 : Prop) : Prop :=
  Or51 of P1 | Or52 of P2 | Or53 of P3 | Or54 of P4 | Or55 of P5.Inductive or5 (P1 P2 P3 P4 P5 : Prop) : Prop :=
  Or51 of P1 | Or52 of P2 | Or53 of P3 | Or54 of P4 | Or55 of P5.Inductive or6 (P1 P2 P3 P4 P5 P6 : Prop) : Prop :=
  Or61 of P1 | Or62 of P2 | Or63 of P3 | Or64 of P4 | Or65 of P5 | Or66 of P6.Inductive or6 (P1 P2 P3 P4 P5 P6 : Prop) : Prop :=
  Or61 of P1 | Or62 of P2 | Or63 of P3 | Or64 of P4 | Or65 of P5 | Or66 of P6.Inductive or6 (P1 P2 P3 P4 P5 P6 : Prop) : Prop :=
  Or61 of P1 | Or62 of P2 | Or63 of P3 | Or64 of P4 | Or65 of P5 | Or66 of P6.Inductive or6 (P1 P2 P3 P4 P5 P6 : Prop) : Prop :=
  Or61 of P1 | Or62 of P2 | Or63 of P3 | Or64 of P4 | Or65 of P5 | Or66 of P6.Inductive or6 (P1 P2 P3 P4 P5 P6 : Prop) : Prop :=
  Or61 of P1 | Or62 of P2 | Or63 of P3 | Or64 of P4 | Or65 of P5 | Or66 of P6.Inductive or6 (P1 P2 P3 P4 P5 P6 : Prop) : Prop :=
  Or61 of P1 | Or62 of P2 | Or63 of P3 | Or64 of P4 | Or65 of P5 | Or66 of P6.Inductive or6 (P1 P2 P3 P4 P5 P6 : Prop) : Prop :=
  Or61 of P1 | Or62 of P2 | Or63 of P3 | Or64 of P4 | Or65 of P5 | Or66 of P6.Inductive or7 (P1 P2 P3 P4 P5 P6 P7 : Prop) : Prop :=
  Or71 of P1 | Or72 of P2 | Or73 of P3 | Or74 of P4 | Or75 of P5 | Or76 of P6 |
  Or77 of P7.Inductive or7 (P1 P2 P3 P4 P5 P6 P7 : Prop) : Prop :=
  Or71 of P1 | Or72 of P2 | Or73 of P3 | Or74 of P4 | Or75 of P5 | Or76 of P6 |
  Or77 of P7.Inductive or7 (P1 P2 P3 P4 P5 P6 P7 : Prop) : Prop :=
  Or71 of P1 | Or72 of P2 | Or73 of P3 | Or74 of P4 | Or75 of P5 | Or76 of P6 |
  Or77 of P7.Inductive or7 (P1 P2 P3 P4 P5 P6 P7 : Prop) : Prop :=
  Or71 of P1 | Or72 of P2 | Or73 of P3 | Or74 of P4 | Or75 of P5 | Or76 of P6 |
  Or77 of P7.Inductive or7 (P1 P2 P3 P4 P5 P6 P7 : Prop) : Prop :=
  Or71 of P1 | Or72 of P2 | Or73 of P3 | Or74 of P4 | Or75 of P5 | Or76 of P6 |
  Or77 of P7.Inductive or7 (P1 P2 P3 P4 P5 P6 P7 : Prop) : Prop :=
  Or71 of P1 | Or72 of P2 | Or73 of P3 | Or74 of P4 | Or75 of P5 | Or76 of P6 |
  Or77 of P7.Inductive or7 (P1 P2 P3 P4 P5 P6 P7 : Prop) : Prop :=
  Or71 of P1 | Or72 of P2 | Or73 of P3 | Or74 of P4 | Or75 of P5 | Or76 of P6 |
  Or77 of P7.Inductive or7 (P1 P2 P3 P4 P5 P6 P7 : Prop) : Prop :=
  Or71 of P1 | Or72 of P2 | Or73 of P3 | Or74 of P4 | Or75 of P5 | Or76 of P6 |
  Or77 of P7.Notation "[ /\ P1 , P2 , P3 , P4 , P5 & P6 ]" :=
  (and6 P1 P2 P3 P4 P5 P6) : type_scope.Notation "[ /\ P1 , P2 , P3 , P4 , P5 , P6 & P7 ]" :=
  (and7 P1 P2 P3 P4 P5 P6 P7) : type_scope.Notation "[ \/ P1 , P2 , P3 , P4 | P5 ]" :=
  (or5 P1 P2 P3 P4 P5) : type_scope.Notation "[ \/ P1 , P2 , P3 , P4 , P5 | P6 ]" :=
  (or6 P1 P2 P3 P4 P5 P6) : type_scope.Notation "[ \/ P1 , P2 , P3 , P4 , P5 , P6 | P7 ]" :=
  (or7 P1 P2 P3 P4 P5 P6 P7) : type_scope.

Lemma andX (a b : bool) : reflect (a * b) (a && b).