👉 In mathematics, a subreniform is a subset of a larger set that contains at least one element that is a limit point of the larger set but does not belong to it. Subreniforms are often used in topology and analysis to describe subsets that are neither compact nor closed, but have certain properties like being connected or having a finite diameter. For example, the union of two subreniforms is again a subreniform; the intersection of two subreniforms is also a
