Tiberiu Popoviciu (1906–1975) was a Romanian mathematician and the namesake of Popoviciu's inequality and
Popoviciu's inequality on variances.
The Tiberiu Popoviciu High School of Computer Science in Cluj-Napoca is named after him.In 1951 he founded a research institute which now bears his name: Tiberiu Popoviciu Institute of Numerical Analysis.