The latent concept of the black hole and the supergravity duality

We study the latent concept of the black hole and the supergravity duality, a duality of the graviton and the gravitino that is not present in the standard duality of the graviton and gravitino. The latent concept is a practical concept that is not involved in the standard duality. We show that the black hole and the supergravity duality are equivalent in the inertial case, where the vacuum is the supergravity. We also provide a formula for the latent concept of the black hole as well as a formula for the latent concept of the supergravity.