Professor Emeritus Israel Kleiner, a distinguished Canadian mathematician and historian of mathematics who taught at York University for 37 years, passed away on Aug. 5, 2024.
Kleiner's career spanned several decades at York and was marked by significant contributions to both the field of mathematics and the education of future generations.
Earning an MA from Yale University in 1963 and a PhD from McGill University in 1967, Kleiner's doctoral thesis, "Lie Modules and Rings of Quotients," focused on ring theory. Joining York University in 1965, Kleiner’s career as a long-serving faculty member was dedicated to teaching and research, and continued until his retirement in 2002.
During his time at York, Kleiner played a crucial role in coordinating the training program for secondary school mathematics teachers. A passion for the history of mathematics and its integration into mathematics education was evident in his work. He taught the Math 5400 6.0 History of Mathematics course and compiled an extensive bibliography of sources in the history of mathematics in 2003, which remains a valuable resource for students and researchers. Sheldon Levy, a York University alum who has held several leadership roles in higher education – including most recently president and vice-chancellor of Toronto Metropolitan University, and president and vice-chancellor of University Canada West – recalls learning ring theory from Kleiner during his graduate studies and the impact it had.
“Israel taught me ring theory in my graduate course at York. I still hold onto the text. There was no course in which I learned more – in fact, I think it was from this course I understood what being a mathematician was all about,” says Levy. “We were pushed to be better as students and colleagues. Israel was always supportive and had extra time for all his students. I remember his wonderful sense of humour, encouragement and smile. In short, he made a difference to me and hundreds, if not thousands, of students to be their best. I send my sincere condolences to his family and, to Israel, a big thank you for all you have given to your students.”
Israel Kleiner is the author of three published books: A History of Abstract Algebra (2007, translated into several languages), Excursions in the History of Mathematics (2012), and Turning Points in the History of Mathematics (2016).
Throughout his career, Kleiner received numerous accolades including the Carl B. Allendoerfer Award in 1987 and 1992, the George Pólya Award in 1990 and the Lester Randolph Ford Award in 1995. Serving as vice-president of the Canadian Society for the History and Philosophy of Mathematics further highlighted his contributions.
Outside of teaching and research, some of his other interests included world travel, politics, classic films and television and music – particularly big band jazz, crooners and classical.
Kleiner's legacy extends beyond academic achievements. A dedicated mentor and active liaison with secondary schools, he fostered a love for mathematics among young students.
Kleiner was a devoted and loving husband, father, father-in-law, grandfather, brother, brother-in-law, uncle and friend.
With files from Marissa Barlas