matchedpair
Matched pair is a term used in multiple disciplines to denote a pair of related objects that are matched or interact according to a defined rule.
In statistics and data analysis, a matched-pair design pairs units that are similar on key characteristics.
In algebra and related areas, a matched pair refers to a pair of algebraic structures equipped with
The term is sometimes used more loosely in combinatorics or related fields to describe a well-defined pairing