On the autological character of diagonalizable algebras

Summary Let be the first order theory of diagonalizable algebras. We define a bijection from the atomic formulas of (identities) to the open formulas of . is an algebraic analogous of ≒. We prove that , ^-1 preserve the validity.The algebraization of the theories which express TheorSee the precedent papers with the same subtitle.Allatum est die 21 Julii 1975