Scalar conformal differential invariants
Ignacio Sánchez Universidad de Granada
In a lesser-known paper [Berl. Ber. 1921, pp. 261-264], Albert Einstein proposed the natural addition of a scalar differential equation to the field equations of General Relativity. I shall explore this suggestion from a geometrical point of view. As a consequence, I will show a family of scalar conformal invariants for generic (pseudo-)Riemannian manifolds of dimension greater than 3.