Forti, Marco Quasiselective and weakly Ramsey ultrafilters. (English) Zbl 1518.03011 Riv. Mat. Univ. Parma (N.S.) 13, No. 1, 73-86 (2022). Reviewer: Boris Šobot (Novi Sad) MSC: 03E05 03E02 03E65 PDFBibTeX XMLCite \textit{M. Forti}, Riv. Mat. Univ. Parma (N.S.) 13, No. 1, 73--86 (2022; Zbl 1518.03011) Full Text: arXiv Link
Di Nasso, Mauro; Forti, Marco Hausdorff ultrafilters. (English) Zbl 1096.03056 Proc. Am. Math. Soc. 134, No. 6, 1809-1818 (2006). Reviewer: Kiyoshi Iseki (Osaka) MSC: 03E05 03H05 54D80 PDFBibTeX XMLCite \textit{M. Di Nasso} and \textit{M. Forti}, Proc. Am. Math. Soc. 134, No. 6, 1809--1818 (2006; Zbl 1096.03056) Full Text: DOI
Di Nasso, Mauro; Forti, Marco Ultrafilter semirings and nonstandard submodels of the Stone-Čech compactification of the natural numbers. (English) Zbl 1079.16036 Blass, Andreas (ed.) et al., Logic and its applications. Result of the conference on logic and its applications in algebra and geometry, Ann Arbor, MI, USA, April 11–13, 2003 and the workshop on combinatorial set theory, excellent classes, and Schanuel conjecture, Ann Arbor, MI, USA, April 14–15, 2003. Providence, RI: American Mathematical Society (AMS) (ISBN 0-8218-3474-6/pbk). Contemporary Mathematics 380, 45-51 (2005). MSC: 16Y60 03H15 54D80 PDFBibTeX XMLCite \textit{M. Di Nasso} and \textit{M. Forti}, Contemp. Math. 380, 45--51 (2005; Zbl 1079.16036)
Di Nasso, Mauro; Forti, Marco Topological and nonstandard extensions. (English) Zbl 1073.54015 Monatsh. Math. 144, No. 2, 89-112 (2005). Reviewer: Paul Bankston (Milwaukee) MSC: 54D35 03H05 03C20 54J05 PDFBibTeX XMLCite \textit{M. Di Nasso} and \textit{M. Forti}, Monatsh. Math. 144, No. 2, 89--112 (2005; Zbl 1073.54015) Full Text: DOI
Forti, Marco; Di Nasso, Mauro; Benci, Vieri Hausdorff nonstandard extensions. (English) Zbl 1061.54018 Bol. Soc. Parana. Mat. (3) 20, No. 1-2, 9-20 (2002). Reviewer: T. Thrivikraman (Cochin) MSC: 54D35 03H05 03C20 54D80 54J05 PDFBibTeX XMLCite \textit{M. Forti} et al., Bol. Soc. Parana. Mat. (3) 20, No. 1--2, 9--20 (2002; Zbl 1061.54018)