(2 + 1) BTZ black hole and multiply warped product spacetimes
The authors of the present paper study the interior solutions of the \((2+1)\) Banados-Teitelboim-Zanelli black holes and the exterior solutions of the \((2+1)\) de Sitter black holes. The Ricci components and the scalar curvature are evaluated in the interior and exterior of the event horizons without discontinuities.
scientific article; zbMATH DE number 2031237