Schrödinger's equation is a fundamental equation in quantum mechanics.

Schrödinger's equations are used to describe the behavior of quantum systems.

Schrodinger's equations are used to describe the behavior of quantum systems.

The Schrodinger equation describes the behavior of quantum systems.

Schroedinger's equation is a fundamental equation in quantum mechanics.

Schrodinger's equation is a fundamental equation in quantum mechanics.

The rate equations for the reaction were derived from the experimental data.

Pell's equations are a type of Diophantine equation.

The Pell equation is a type of Diophantine equation.

Pell equations are a type of Diophantine equation.