👉 Pseudofinally is a mathematical concept in algebra and analysis. It was introduced by Charles Hyers in 1907 as a way to extend the domain of the formal real numbers beyond the reals to include infinitesimals. In its simplest form, a pseudofinal is an infinitesimal number that can be expressed as a limit of infinitely many infinitesimal terms. For example, the set of all infinitesimal numbers forms a dense subset of the real numbers and has been used
