An expression of the conservation of energy in the steady flow of an incompressible, inviscid fluid; it states that the quantity (p /ρ) + gz + (v²/2) is constant along any streamline, where p is the fluid pressure, v is the fluid velocity, ρ is the mass density of the fluid, g is the acceleration due to gravity, and z is the vertical height. Also known as Bernoulli equation; Bernoulli law.

See <<law of large numbers>>