Canonical maintained two discrete versions of Unity, which are visually almost indistinguishable but technically different.

In application, populations are generally finite, making the discrete version more realistic.

By 1960, a discrete version of these equations was being extensively used in electrical engineering and geophysics, their use continuing until the present day.

The voter model (usually in continuous time, but there are discrete versions as well) is a process similar to the contact process.

It is a discrete version of the Duffing equation.

This is similar to the discrete version except that s and t are constrained only to be non-negative real numbers instead of integers.

The discrete version can be defined on any graph, usually a lattice in d-dimensional Euclidean space.

There is a burgeoning field studying discrete versions of isomonodromy equations.

These different, discrete versions of the same gene are called alleles.

It is like a discrete version of the indefinite product integral.