There are 40 mathematicians whose last name begin with RIA.
| Riabouchinski (Riabouchinsky), Dmitri (Dimitri) | Université de Paris | 1922 |
| Riabov, Georgii | Institute of Mathematics of the National Academy of Sciences of Ukraine | 2012 |
| Riabova, Natalia | Kharkiv National University of Radioelectronics | 1989 |
| Riabtsev, Vladimir | Kharkiv National University of Radioelectronics | 2003 |
| Riad, Driss | Université Hassan II de Casablanca | 2018 |
| Riahi, Anis | Université Tunis-El Manar | 2010 |
| Riahi, Daniel | Florida State University | 1974 |
| Riahi, Hasna | Rutgers University, New Brunswick | 1993 |
| Riahi, Hassan | Université Montpellier II | 1989 |
| Riahi, Mohamed Kamel | Université Pierre-et-Marie-Curie - Paris VI | 2012 |
| Riahi, Sheida | Mississippi State University | 2020 |
| Rial, Diego | Instituto de Matemática Pura e Aplicada | 1992 |
| Rialle, Vincent | ||
| Rian, Khalid | Aarhus University | 2011 |
| Rian, Tarik | Aarhus University | 2007 |
| Riane, Nizare | Sorbonne Université | 2022 |
| Riano, David | Universitat Politècnica de Catalunya | 1997 |
| Riaño, Oscar | Instituto de Matemática Pura e Aplicada | 2020 |
| Riaño Riaño, Richar | Universidad Nacional de Córdoba | 2013 |
| Riasanovsky, Alex | Iowa State University | 2021 |
| Riasat, Ayesha | Abdus Salam School of Mathematical Sciences GC University, Lahore | 2013 |
| Riauba, Bronius | Vilniaus universitetas | 1963 |
| Riaz, Asra | International Islamic University Islamabad | 2024 |
| Riaz, Atif | City, University of London | 2020 |
| Riaz, Mehwish | University of Auckland | 2012 |
| Riaz, Muhammad | 2013 | |
| Riaz, Muhammad | Universiteit van Amsterdam | 2008 |
| Riaz, Muhammad | University of the Punjab | 2014 |
| Riaz, Parveen | Christian-Albrechts-Universität zu Kiel | 1978 |
| Riaz, Qaiser | Rheinische Friedrich-Wilhelms-Universität Bonn | 2016 |
| Riaz, Usman | University of Peshawar | 2021 |
| Riaz, Usman | University of Southern California | 2008 |
| Riazantsev, Alexander | Kharkiv National University of Radioelectronics | 2009 |
| Riazati, Farzan | University of Florida | 2001 |
| Riazi, Abdolhamid | University of Calgary | 1979 |
| Riazi, Nematollah | University of Sussex | 1990 |
| Riazi, Sara | University of Oregon | 2019 |
| Riazi, Siavash | University of Idaho | 2018 |
| Riazi-Kermani, Mohammad | Michigan State University | 1984 |
| Riazuddin, | University of Cambridge | 1959 |