• Action (physics)
• Advection equation
• Arrhenius equation

B

• Barotropic vorticity equation
• Bellman equation
• Bernoulli's equation
• Birch-Murnaghan equation of state
• Black-Scholes
• Boltzmann equation
• Burgers' equation

C

• Cauchy-Riemann equations
• Chaplygin's equation
• Chapman-Kolmogorov equation
• Characteristic equation
• Clairaut's equation
• Constitutive equation
• Continuity equation
• Cubic equation

D

• Darcy-Weisbach equation
• Dirac equation
• Drake equation

E

• E=mc²
• Einstein's field equation
• Electromagnetic field
• Equation
• Equation of motion
• Equation of state
• Equation solving
• Euler equations

F

• Field equation
• Fisher equation
• Fokker-Planck equation
• Fredholm integral equation
• Fresnel equations

F cont.

• Friedmann equations

G

• Gibbs-Helmholtz equation

H

• Haig-Simons equation
• Hamilton-Jacobi-Bellman equation
• Helmholtz equation
• Henderson-Hasselbalch equation
• Hill's Model
• Hubbert curve

I

• Itô calculus

J

• Jacobi field

K

• Kepler's laws of planetary motion
• Kerr-Newman metric
• Klein-Gordon equation
• Korteweg-de Vries equation

L

• Lamé's Special Quartic
• Lane-Emden equation
• Langevin equation
• Laplace's equation
• Larmor equation
• Lindblad equation
• Linear equation
• Liouville equation
• List of equations
• List of relativistic equations
• Logistic function
• Lorentz transformation
• Lotka-Volterra equation
• Lotka-Volterra inter-specific competition equations

M

• Master equation
• Maurer-Cartan form
• Maxwell's equations
• Maxwell's nonlinear equations
• Method of undetermined coefficients
• Michaelis-Menten kinetics

N

• Navier-Stokes equations

N cont.

• Nernst equation
• Nonlinear Schrodinger equation

P

• Parametric equation
• Penman equation
• Poisson's equation
• Pp-wave metrics
• Price equation
• Prony equation

Q

• Quadratic equation
• Quartic equation
• Quintic equation

R

• Rankine-Hugoniot equation
• Rarita-Schwinger equation
• Relativistic Euler equations
• Relativistic wave equations
• Reynolds-averaged Navier-Stokes equations
• Riccati equation
• Roothaan equations

S

• Schrödinger equation
• Schwinger-Dyson equation
• Screened Poisson equation
• Sellmeier equation
• Simultaneous equations
• Sine-Gordon equation
• Solution set
• Starling equation
• Stochastic differential equation
• System of linear equations

T

• Tsiolkovsky rocket equation

V

• Van der Waals equation
• Vorticity equation

W

• Washburn's equation
• Wave equation
• Wheeler-deWitt equation
• Wiener equation