Petrov classification
= Petrov classification
{wiki=Petrov_classification}
The Petrov classification is a system used to categorize solutions to the Einstein field equations in general relativity based on the properties of their curvature tensors, specifically the Riemann curvature tensor. It is named after the Russian physicist A. Z. Petrov, who introduced it in the 1950s. The classification divides spacetimes into different types based on the algebraic properties of the Riemann tensor.