title: Equation (disambiguation)
text: # Equation (disambiguation)
  
  An equation in mathematics is a formula stating that two expressions have the same value.
  
  Equation may also refer to:
  
  * Chemical equation, a symbolic representation of a chemical reaction
  * Equation of time, the difference between solar time, as shown by a sundial, and mean time, as shown by a clock that runs at constant speed
     * Equation clock, a clock that contains a mechanism that embodies the equation of time, so the clock shows solar time
  * Equation of state, a relationship between physical conditions and the state of a material
  * Equation (band), an English folk band formed in 1996
  * Equation Group, a computer espionage group
  * "The Equation", a 2008 episode of Fringe
  * "[Equation]" $(ΔM_i^{−1}$ = $−αΣ_{n=1}^ND_i[n]$ $[Σ_{j∈C[i]}F_{ji}[n$ − 1] + $Fext_i[n^{−1}]]),$ the first B-side of "Windowlicker" by Aphex Twin, also known as "[Formula]"
  