There are 63 mathematicians whose last name begin with ORTI.
| Ortigas-Galindo, Jorge | Universidad de Zaragoza | 2013 |
| Ortigas-Galindo, Jorge | Université de Pau et des Pays de l'Adour | 2013 |
| Ortigoza Capetillo, Gerardo | University of Minnesota - Twin Cities | 2003 |
| Ortigoza-Suarez, Isaac | Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV-IPN) | 2022 |
| Ortigueira, Manuel | Instituto Superior Técnico | 1984 |
| Ortigueira, Salvador | Universidad Carlos III de Madrid | 1995 |
| Ortí Lahoz, Angel | ||
| Ortín, Tomás | Universidad Autónoma de Madrid | 1990 |
| Ortisi, Matteo | Università degli Studi di Milano | 2007 |
| Ortiz, Alejandro Andres | University of California, Davis | 2011 |
| Ortiz, April | University of Texas at Austin | 2009 |
| Ortiz, Camilo | Georgia Institute of Technology | 2014 |
| Ortiz, Carlos | University of Wisconsin-Madison | 1997 |
| Ortiz, Cristián | Instituto de Matemática Pura e Aplicada | 2009 |
| Ortiz, Eduardo | Universidad de Buenos Aires | 1961 |
| Ortiz, Irene | Universidad de Murcia | 2016 |
| Ortiz, Ivonne | State University of New York at Binghamton | 2003 |
| Ortiz, Joseph | University of Arizona | 2015 |
| Ortiz, Kip | Florida State University | 2000 |
| Ortiz, Leonardo | University of York | 2011 |
| Ortiz, Luis | Brown University | 2002 |
| Ortiz, Marcos | The University of Iowa | 2015 |
| Ortiz, Michael | University of California, Berkeley | 1981 |
| Ortiz, Miguel | University of Cambridge | 1990 |
| Ortiz, Omar | University of Melbourne | 2013 |
| Ortiz, Pablo | Universiteit Leiden | 2014 |
| Ortiz, Pedro | Universidad Politécnica de Cartagena | 2021 |
| Ortiz, Rosario | University of Illinois at Chicago | 2008 |
| Ortiz, Thomas | École Normale Supérieure de Lyon | 2014 |
| Ortiz, Zeydy | North Carolina State University | 1998 |
| Ortiz-Albino, Reyes | The University of Iowa | 2008 |
| Ortiz Arevalo, Yleana | Michigan State University | 2007 |
| Ortiz-Arroyo, Daniel | Oregon State University | 2002 |
| Ortiz-Bobadilla, Laura | Steklov Institute of Mathematics | 1991 |
| Ortiz Bobea, Ariel | University of Maryland College Park | 2013 |
| Ortiz Buitrago, José | Universidad Nacional de Córdoba | 2002 |
| Ortiz-Caraballo, Carmen | Universidad de Sevilla | 2011 |
| Ortíz Castillo, Yasser | Benemérita Universidad Autónoma de Puebla | 2011 |
| Ortiz Castro, Javier | Universidad de Oviedo | 1985 |
| Ortiz de Elguea, Lourdes | Universidad del País Vasco | 1986 |
| Ortiz Fornaguera, Ramón | Universidad Complutense de Madrid | 1947 |
| Ortiz Gracia, Luis | Universitat Politècnica de Catalunya | 2011 |
| Ortiz, Jr., Charles | University of Pennsylvania | 1996 |
| Ortiz, Jr., Melchor | Texas A&M University | 1975 |
| Ortiz-Latorre, Salvador | Universitat de Barcelona | 2008 |
| Ortiz-López, Víctor | Universidad de Barcelona | 2012 |
| Ortiz Lugo, Alvaro | University of Cincinnati | 2019 |
| Ortiz Marrero, Carlos M. | University of Houston | 2015 |
| Ortíz Morales, Martín | Universidad Nacional Autónoma de México (UNAM) | 2011 |
| Ortiz-Navarro, Juan | The University of Iowa | 2007 |
| Ortiz Nieves, Angela | Arizona State University | 2010 |
| Ortiz Ortiz, Rubén | ||
| Ortiz Rico, Guillermo | Pontificia Universidad Católica de Chile | 2007 |
| Ortiz-Robinson, Norma | Louisiana State University | 2005 |
| Ortiz-Rodríguez, Adriana | 2002 | |
| Ortiz Samudio, Inocencio | Instituto de Matemática Pura e Aplicada | 2017 |
| Ortiz-Sotomayor, Víctor | Universitat Politècnica de València | 2019 |
| Ortiz-Suarez, Augusto | University of Miami | 1968 |
| Ortiz Tarin, Jose | University of California, San Diego | 2021 |
| Ortiz-Ubarri, Jose | University of Puerto Rico at Mayaguez | 2010 |
| Ortiz Vallejo, María del Sagrado Corazón | Universidad de Valladolid | 1991 |
| Ortiz Vargas, Walter | Universitat Autònoma de Barcelona | 2019 |
| Ortiz-Zuazaga, Humberto | University of Puerto Rico at Mayaguez | 2008 |