Jacques Charles François, the discoverer of the algebraic theorem which bears his name, was born in Geneva in 1803. Originally tutor to the son of Madame de Staël, he subsequently resolved, in conjunction with his school-fellow Colladon, to try his fortune in the French metropolis. Sturm soon made the acquaintance of the foremost mathematicians in the capital, and obtained employment on the Bulletin Universelle. On the discovery of his important theorem, namely, the determination of the number of real roots of a numerical equation which are included between given limits, in 23d May 1829, he rapidly rose to fortune and public honours. He was chosen a member of the French Academy in 1836, and was afterwards appointed to succeed Poisson in the chair of Physics at Paris. He presented numerous memoirs to the academy, of which it has been said that an impartial posterity will place them by the side of the finest memoirs of Lagrange. Sturm died on the 18th of December 1855.

Sturm, Johann, better known by the name of Sturmius, a learned philologer and rhetorician, was born at Schleiden, near Cologne, on the 1st of October 1507. He afterwards pursued his study at Liège, in the College of St Jerome, and then went to Louvain in 1524. He there spent five years, three in learning and two in teaching. Stuttgart. He set up a printing-press with Rudger Rescius, professor of Greek, and printed several Greek authors. In 1529 he went to Paris, where he was highly esteemed, and read public lectures on the Greek and Latin writers, and on logic. In 1537 he went to Strasbourg, and the year following opened a school, which became famous, and by his means obtained of Maximilian II. the privileges of a university in the year 1566. He was very well skilled in polite literature, wrote Latin with great purity, and was an able teacher. His talents were not confined to the school; for he was frequently intrusted with deputations in Germany and foreign countries, and discharged these employments with great honour. He showed extreme charity to the refugees on account of religion: he not only laboured to assist them by his advice and recommendations, but he even impoverished himself to aid them. He died on the 3d of March 1589, in the eighty-second year of his age. He was a learned writer, and published various works, which were found to be useful and important by his contemporaries. One of these was an edition of Cicero, in 9 vols. 8vo. He bestowed much labour in elucidating the rhetorical works of Aristotle, Hermogenes, and Cicero. With the view of improving the system of education, he published several treatises, one of which was frequently reprinted. It is entitled De Litterarum Ludis recte operendis liber, Argent., 1538, 4to. F. A. Hallbauer edited a collection of his tracts under the title De Institutione Scholastica Opuscula omnia, Jenae, 1730, 8vo.