# Equation (mathematics)/Related Articles

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*See also changes related to Equation (mathematics), or pages that link to Equation (mathematics) or to this page or whose text contains "Equation (mathematics)".*

## Parent topics

- Mathematics [r]: The study of quantities, structures, their relations, and changes thereof.
^{[e]} - Physics [r]: The study of forces and energies in space and time.
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## Subtopics

### Classes of equations

- Linear equation [r]: Algebraic equation, such as y = 2x + 7 or 3x + 2y − z = 4, in which the highest degree term in the variable or variables is of the first degree.
^{[e]} - Quadratic equation [r]: An equation of the form
*ax*^{2}+*bx*+*c*= 0 where*a*,*b*and*c*are constants.^{[e]} - Solving cubic equations [r]:
*Add brief definition or description* - Algebraic equation [r]:
*Add brief definition or description* - Transcendental equation [r]:
*Add brief definition or description* - Differential equation [r]: An equation relating a function and its derivatives.
^{[e]} - Integral equation [r]:
*Add brief definition or description* - Integro-differential equation [r]:
*Add brief definition or description*

### Specific equations

- Ampere's equation [r]: An expression for the magnetic force between two electric current-carrying wire segments.
^{[e]} - Fenske equation [r]: An equation for calculating the minimum number of theoretical plates needed to separate a binary feed stream by a fractionation column operated at total reflux (i.e., meaning that no overhead product is being withdrawn from the column).
^{[e]} - Maxwell equations [r]: Mathematical equations describing the interrelationship between electric and magnetic fields; dependence of the fields on electric charge- and current- densities.
^{[e]} - Newton equation [r]:
*Add brief definition or description* - Schrödinger equation [r]: A differential equation of quantum mechanics, describing the spatial and temporal behavior of wave functions.
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- Analytic solution [r]:
*Add brief definition or description* - Numerical solution [r]:
*Add brief definition or description* - The Cold Equations [r]: A 1954 short story by Tom Godwin famous for its tragic conclusion in which the unrelenting demands of engineering formulae are unable to be overcome to provide the standard upbeat ending of that era's pulp fiction.
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