Note the odd form for the energy equation; see Rankine-Hugoniot equation.

The largest triangular number of the form 2-1 is 4095, see Ramanujan-Nagell equation.

This way remains positive while is still negative (see first equation in article) and one can solve with real solutions for .

Liquid resistance in pipes is not linear with volume, varying as the square of volumetric flow (see Darcy-Weisbach equation).

See equation of time for a more detailed description of the east-west characteristics of the analemma.

For a description of linear and nonlinear equations, see linear equation.

For more on this equation see Fokker-Planck equation.

For a chemical type of equation, see chemical equation.

See separable partial differential equation.

These forms (see Linear equation for other forms) are generally named by the type of information (data) about the line that is needed to write down the form.