Robert de Montessus de Ballore
Robert Fernand Bernard, Viscount de Montessus de Ballore (20 May 1870, in Villeurbanne – 26 January 1937, in Arcachon) was a French mathematician, known for his work on continued fractions and Padé approximants. Biography Robert de Montessus was a viscount, born to a noble family originating in the Ancien Régime. His father Philippe-Georges de Montessus de Ballore (1825–1890) was an officer who was trained at Saint Cyr and then resigned from the army to manage a farm in Charolais. Robert had three brothers: Fernand de Montessus de Ballore (1851–1923), graduate of l'École polytechnique, seismologist and the first director of the Seismological Service of Chile; Jean (1852–1903), a magistrate; Henri (1862–1918), professor of physics at Grenoble. In 1886, Robert obtained his bachelor of science degree. From 1887 to 1889, he attended preparatory classes at l'École des mines de Saint-Étienne. On 8 May 1905, at the Sorbonne, he successfully defended his thesis on continued fractions, written under the supervision of Paul Appell. On 29 March 1906, he married Suzanne Montaudon (1884–1983). Their marriage produced four children: Simone (1907–?), Jacques (1909–2003), André (1912–1978) and Geneviève (deceased at birth in 1916). Robert de Montessus was an editor of the Journal de mathématiques pures et