Järjend
Järjend is the Estonian term for the mathematical concept known in English as a sequence. It is an ordered collection of elements indexed by natural numbers, where the position in the order determines each term. Formally, a sequence (a_n) assigns to every n in the natural numbers an element a_n from a set X. The nth term is denoted a_n, and sequences can be finite (ending after a finite number of terms) or infinite.
In notation, a sequence is often written as a1, a2, a3, ..., with the indexing starting at 1
A central topic in analysis is the limit of a sequence. A sequence (a_n) converges to L
Sequences underpin much of calculus and analysis, serving to define limits, continuity, and the construction of