ISOsarjat
ISOsarjat is a term used in Finnish-language discussions to describe a family of data sequences defined by an invariant-preserving rule. The expression combines iso- (equal, invariant) with sarjat (series), and is used chiefly in mathematical and data-science literature in Finland. The concept is niche and not widely standardized across disciplines.
Formal definitions of ISOsarjat vary by author, but the common idea is a sequence x0, x1, ... generated
Variants include deterministic ISOsarjat, stochastic ISOsarjat in which T incorporates randomness, and adaptive ISOsarjat where T
ISOsarjat does not denote a single, universally accepted definition; rather it reflects a family of related