Lamberto Cesari

Lamberto Cesari
Born	(1910-09-23)23 September 1910 Bologna
Died	12 March 1990(1990-03-12) (aged 79) Ann Arbor
Citizenship	United States
Nationality	Italian
Fields	Geometric measure theory Mathematical analysis Functional analysis Calculus of variation
Institutions	Istituto Nazionale per le Applicazioni del Calcolo Università di Pisa Università di Bologna University of Michigan
Alma mater	Scuola Normale Superiore
Doctoral advisor	Leonida Tonelli
Other academic advisors	Constantin Carathéodory Mauro Picone
Doctoral students	Jack K. Hale
Known for	Functions of bounded variation Nonlinear functional analysis Theory of surface area

Lamberto Cesari (23 September 1910 – 12 March 1990) was an Italian mathematician naturalized in the United States, known for his work on the theory of surface area, the theory of functions of bounded variation, the theory of optimal control and on the stability theory of dynamical systems: in particular, by extending the concept of Tonelli plane variation, he succeeded in introducing the class of functions of bounded variation of several variables in its full generality.

In 1933, he was awarded his laurea degree at the Scuola Normale Superiore in Pisa under the direction of Leonida Tonelli. After a period of study from 1934 to 1935 in Germany at Monaco di Baviera under the direction of Constantin Carathéodory, he went back to Pisa at the Scuola Normale Superiore for a year, and then to Rome at the Istituto Nazionale per le Applicazioni del Calcolo, at the time directed by Mauro Picone.

From 1938 to 1946 he went back as a professore incaricato at Pisa University: in 1947 he was at the University of Bologna as a professor of mathematical analysis.