Alpha-theory: An elementary axiomatics for nonstandard analysis

Internal set theory: A new approach to nonstandard analysis

Edward Nelson · Bulletin of the American Mathematical Society · 1977 · 633 citations · Full text

Natural Sciences, Mathematics, Formal Methods +8

Homogeneity problems in the theory of Čech compactifications

Walter Rudin · Duke Mathematical Journal · 1956 · 242 citations

Natural Sciences, Mathematics, Discrete Mathematics +7

Applied non-standard analysis

Gian‐Carlo Rota · Advances in Mathematics · 1978 · 205 citations

APPLICATIONS OF MODEL THEORY TO ALGEBRA, ANALYSIS AND PROBABILITY

A. Erdélyi · Bulletin of the London Mathematical Society · 1970 · 191 citations

Natural Sciences, Mathematics, Algebra +11

Ultrafilters on a countable set

David Booth · Annals of Mathematical Logic · 1970 · 168 citations

Natural Sciences, Mathematics, Set Theory +3