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Drake equation
(exobiology) A formula for calculating the probability of civilizations existing elsewhere in the Milky Way galaxy and of their ability to communicate with Earth.
differential equation
(calculus) an equation involving the derivatives of a function
( canonical )
( canonical )
( plural )
Arrhenius equation
(chemistry) An equation which approximates the dependence of the rate of any chemical reaction on the temperature.
Pell's equation
(number theory) The Diophantine equation x²-my²=1 for a given integer m, to be solved in integers x and y.
parametric equation
(mathematics) a set of equations that defines the coordinates of the dependent variables (x, y and z) of a curve or surface in terms of one or more independent variables or parameters
integral equation
(mathematics) An equation involving a function f(x) and integrals of that function to be solved for f(x)
Kepler's equation
(astronomy, celestial mechanics) the mathematical relationship between the mean anomaly (M) and the eccentric anomaly (E) of a planet in an elliptical orbit with eccentricity (𝜀). M=E-𝜀· sin (E).
Lagrange's equations
(mathematics) a set of equations of motion of a mechanical system which relate the kinetic energy of the system to its generalized coordinates
quadratic equation
(mathematics) a polynomial equation of the second degree.
linear equations
plural of linear equation