English Bianchi classification Cited by user Forbes72 on 19 Jan 2020 In mathematics, the Bianchi classification provides a list of all real 3-dimensional Lie algebras (up to isomorphism).
English BKL singularity Cited by user Citation bot on 18 Sep 2009 A BKL (Belinsky–Khalatnikov–Lifshitz) singularity is a model of the dynamic evolution of the Universe near the initial singularity, described by an anisotropic…