Tiberiu Popoviciu Institute of Numerical Analysis is organizing a tribute conference dedicated to the 120th anniversary of Tiberiu Popoviciu (1906–1975), the founder of numerical analysis in Romania, one of the pioneers of computer science in Romania, and a trailblazer of the IT industry in Cluj-Napoca.
The conference will take place on Wednesday 22nd April 2026, starting at 10 AM, at the Romanian Academy, Cluj-Napoca Branch, Republicii Street no. 9, conference room, 2nd floor. The event will include a lecture by Dr. Emil Cătinaș titled “Tiberiu Popoviciu: Contributions to Mathematics and Foundations of Computer Science in Romania,” followed by an open discussion inviting all those who have collaborated with or interacted with the Institute of Numerical Analysis throughout its 75 years of existence.
Tiberiu Popoviciu was a world-class scholar who left his mark on three distinct fields: mathematics (numerical analysis and approximation theory), software and hardware.
He is considered by prominent mathematicians and science historians as “one of the greatest Romanian mathematicians” [1], “undoubtedly […] the first great mathematician produced by Transylvania after Janos Bolyai” [1], and “[the one who] laid the foundations of numerical analysis in the country” [2]. “Tiberiu Popoviciu remains in our mathematics among the great analytical forces, as well as the mathematician who opened the way in grand style for numerical analysis research here” [3]. He was one of the founders of computer science in Romania at the Institute of Numerical Analysis that he established, where the foundations of the IT industry in Cluj-Napoca were laid through the development of numerical analysis and computer science (through the DACICC-1 computer, Romania became the 11th country in the world to build a transistorized computer), as well as through the training of the first specialist programmers and engineers (software and hardware).
Tiberiu Popoviciu was an exceptional mathematician with world-leading results in mathematical analysis, numerical analysis, approximation theory, and also in algebra (number theory). Among his high-impact scientific contributions are the introduction and study of B-spline and cardinal spline functions (1934, 1941) decades before they gained widespread applications in data analysis, scientific computing, industrial design, computer graphics, and image processing.
His pioneering contributions have been recognized at the highest level: L.N. Trefethen (Univ. Oxford, Univ. Harvard) included him in the list “Who invented the great numerical algorithms?” [4], and C. de Boor, A. Pinkus [5] and I.J. Schoenberg [6] described the priorities of his results.
One of his articles published in 1935 in the journal Mathematica (Cluj) gained over 200 citations between 2015-2025 alone in important journals and conferences in fields such as artificial intelligence (NeurIPS conference), neural networks, mathematical statistics, linear algebra, quantum physics, and quantum computing.
A graduate of the University of Bucharest (1927) and École Normale Supérieure in Paris (1928), he earned his doctorate from the Université Paris-Sorbonne (1933) with a thesis supervised by Paul Montel. After defending his doctorate, Tiberiu Popoviciu arrived in Cluj as secretary of the Mathematics Seminar of the University of Cluj (1933), then assistant until 1936. He was a lecturer at the Faculty of Sciences of the University of Cernăuți (1936-1940), lecturer at the University of Bucharest (1940-1942), professor at the University of Iași (1942-1946), returning as professor to the University of Cluj in 1946. He became a corresponding member of the Romanian Academy in 1948 and a full member in 1963.
A true pioneer in the development of science and technology in Romania, Tiberiu Popoviciu founded the Mathematics Section of the Cluj Branch of the Romanian Academy in 1951, which was transformed into the Institute of Numerical Analysis in 1957. There, he trained and coordinated teams of engineers, physicists, mathematicians, and technicians with the goal of building and utilizing modern computers for the development of fundamental science, scientific computing, and applied mathematics. Under his leadership, the first Romanian computer with transistors and internal ferrite memory (DACICC-1, 1963) and the first Romanian computer with an operating system and compiler (DACICC-200, 1968) were built in Cluj. Over the years, the applied research activity proved to be remarkably prolific, successfully providing concrete solutions to complex problems in various fields (economics, engineering, industry, medicine): by 1975, over 100 contracts with various enterprises and institutions had been successfully carried out.
Tiberiu Popoviciu distinguished himself not only as a scientist but also as a founder of research institutions. He laid the groundwork for visionary research directions and trained entire generations of mathematicians and computer scientists, mentoring over 20 doctoral students throughout his career. He coordinated research seminars and organized international conferences that brought important names in world mathematics to Cluj (J. Dieudonné, P. Erdős, S. M. Nikolskii, A. M. Ostrowski, I. J. Schoenberg; C. Corduneanu, C. Foiaș, A. Haimovici, G. Moisil, M. Nicolescu, etc.). In 1959, he re-established the journal Mathematica (Cluj) as editor-in-chief, which had a wide international circulation. Founded in 1929 by Petre Sergescu, the journal published renowned mathematicians (E. Cartan, J. Dieudonné, M. Fréchet, J. Hadamard, H. Lebesgue, N. Luzin, P. Montel, E. Picard, W. Sierpinski, V. Volterra, etc.) and had been suspended in 1948. Tiberiu Popoviciu contributed to the founding of the Computer Machinery (Informatics) Section at the Faculty of Mathematics of the University of Cluj in 1962 (where he gave the first courses in programming languages), as well as the informatics high school in Cluj in 1971.
References:
https://ictp.acad.ro/istoric
https://ictp.acad.ro/tiberiu-popoviciu-unul-din-fondatorii-informaticii-din-romania
[1] C. Iacob, Academician Profesor Tiberiu Popoviciu (1906-1975). Gaz. Mat., 80 (1975) no. 12, 451-453.
[2] M. Nicolescu, ş.a., Activitatea matematică a profesorului Tiberiu Popoviciu – la a 50-a aniversare a zilei de naştere, Stud. Cerc. Mat. (Cluj), 8 (1957) nos. 1-2, pp. 7-19.
[3] G. Şt. Andonie, Istoria matematicii în România, Ed. Ştiinţifică, Bucureşti, 1966, p. 184.
[4] L.N. Trefethen, Who invented the great numerical algorithms?, https://people.maths.ox.ac.uk/trefethen/inventors25.pdf
[5] C. de Boor, A. Pinkus, The B-spline recurrence relations of Chakalov and of Popoviciu, J. Approx. Theory, 124 (2003), 115-123.
[6] I.J. Schoenberg, On spline interpolation at all integer points of the real axis, Mathematica, 10(33) (1968) no. 1, 151-170.
Zoom: The event will be online on Zoom using this access link
or the details below
Meeting ID: 831 7483 1334
Passcode: 026716
