Anti-de Sitter space bell. It might be described as being the "opposite" of the surface of a sphere, which has a positive curvature. General relativity is a theory of the nature of time, space and gravity in which gravity is a curvature of space and time that results from the presence of matter or energy. Energy and mass are equivalent (as expressed in the equation "E" = "mc"), and space and time can be translated into equivalent units based on the speed of light ("c" in the "E" = "mc" equation). A common analogy involves the way that a dip in a flat
E=MC² (Mariah Carey album) critics compared "E=MC²" heavily to Carey's previous album, "The Emancipation of Mimi", and felt it followed the same formula of ballads and dance-able tracks. Freedom De Luc of "The Washington Post" felt that after experiencing strong success for the first time in the 2000s with "Mimi", Carey tried to create "E=MC²" with the same formula, although possibly a little improved: "Having found that winning formula of coquettish club bangers, emotional ballads and frisky, mid-tempo coos, the diva with the golden tone has eschewed radical experimentalism here for stasis. 'E=MC²' is mostly more of the same, then, with the '2' representing