Traian Lalescu

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Traian Lalescu

Born July 12, 1882
Bucharest, Romania
Died June 15, 1929
Bucharest, Romania
Residence Romania
Nationality Romania
Field Mathematician
Institution Polytechnic University of Timişoara
University of Bucharest
Alma mater University of Bucharest
University of Paris
Academic advisor Émile Picard
Known for Integral equations

Traian Lalescu (July 12, 1882, Bucharest–June 15, 1929, Bucharest) was a Romanian mathematician of great renown. His main focus was on integral equations. Other subjects to which he contributed include functional equations, trigonometric series, mathematical physics, geometry, mechanics, algebra, and the history of mathematics.

Contents

[edit] Life

He went to the Carol I High School in Craiova, continuing high school in Roman and Iaşi. After entering the University of Iaşi, he completed his undergraduate studies in 1903 at the University of Bucharest.

He earned his Ph.D. in Mathematics from the University of Paris in 1908. His dissertation, Sur les équations de Volterra, was written under the direction of Émile Picard. In 1911, he published Introduction to the Theory of Integral Equations, the first book ever on the subject of integral equations.

He was a professor at the University of Bucharest, the Polytechnic University of Timişoara (where he was the first rector, in 1920), and the Polytechnic University of Bucharest.

[edit] The Lalescu sequence

L_{n} = \sqrt[n+1]{(n+1)!}-\sqrt[n]{n!}
\lim_{n\to\infty} L_{n} = \frac{1}{e}

[edit] Legacy

There are several institutions bearing his name, including Colegiul Naţional de Informatică Traian Lalescu in Hunedoara and Liceul Teoretic Traian Lalescu in Reşiţa. There is also a Traian Lalescu Street in Timişoara. The National Mathematics Contest Traian Lalescu for undergraduate students is also named after him.

A statue of Lalescu, executed in 1930 by Cornel Medrea, is situated in front of the Faculty of Mechanics, in Timişoara.

[edit] Work

  • T. Lalesco, Introduction à la théorie des équations intégrales. Avec une préface de É. Picard, Paris: A. Hermann et Fils, 1912. VII + 152 pp. JFM entry
  • Traian Lalescu, Introducere la teoria ecuaţiilor integrale, Editura Academiei Republicii Populare Romîne, 1956. 134 pp. (A reprint of the first edition [Bucharest, 1911], with a bibliography taken from the French translation [Paris, 1912]). MR0085450

[edit] External links


Persondata
NAME Lalescu, Traian
ALTERNATIVE NAMES
SHORT DESCRIPTION Mathematician
DATE OF BIRTH July 12, 1882
PLACE OF BIRTH Bucharest, Romania
DATE OF DEATH June 15, 1929
PLACE OF DEATH Bucharest, Romania
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