BTZ black hole

A BTZ black hole, named after physicists Stefan Banados, Claudio Teitelboim, and Jorge Zanelli, is a solution to Einstein's equations of general relativity in a lower-dimensional (specifically 2+1 dimensions) spacetime with a negative cosmological constant. The BTZ black hole provides a model for a black hole that captures many of the properties of higher-dimensional black holes but is simpler due to its lower dimensionality.