+A **difference equation** is a mathematical equation relating terms of a [Sequence](/wiki/sequence) at different indices. It describes how a quantity changes discretely over time or steps, serving as a discrete analog to a [Differential Equation](/wiki/differential_equation).
+## See also
+- [Recurrence Relation](/wiki/recurrence_relation)
+- [Discrete Mathematics](/wiki/discrete_mathematics)
+- [Chaos Theory](/wiki/chaos_theory)