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
Indeterminate equation Indeterminate equation An indeterminate equation, in mathematics, is an equation for which there is more than one solution; for example, 2"x" = "y" is a simple indeterminate equation, as are a"x" + b"y" = c and "x" = 1. Indeterminate equations cannot be solved uniquely. Prominent examples include the following: Univariate polynomial equation: which has multiple solutions for the variable "x" in the complex plane unless it can be rewritten in the form formula_2. Non-degenerate conic equation: where at least one of the given parameters "A", "B", and "C" is non-zero, and "x" and "y" are real variables. Pell's equation: