# The Encyclopedia Americana (1920)/Jacobi, Karl Gustav Jakob

**JACOBI, Karl Gustav Jakob**, German
mathematician: b. Potsdam, 10 Dec 1804; d.
Berlin, 18 Feb. 1851. He obtained his education
at the University of Berlin, where he studied
especially mathematics and philosophy, later in
1824 becoming a privat-docent there. In 1825
he became assistant professor of mathematics
at Königsberg and in 1827 was appointed
professor. He was appointed a member of the
Prussian Academy of Sciences in 1836 and from
1842 till his death in 1851 lectured at the
University of Berlin. His most important work was
on the theory of elliptic functions, but he also
made some valuable contributions to the theory
of numbers and determinants. Only a small
portion of his writings and lectures were
published during his lifetime and the greater part
of these were published in the *Crelles Journal*.
Among these are ‘Fundamenta Nova Theoriæ
Functionum Ellipticarum’ (1829); ‘Canon
Arithmeticus’ (1839); ‘De Formatione et
Proprietatibus Determinantium’ (1841);
‘Mathematische Werke’ (1846-71), A complete
edition of his works, ‘Gesammelte Werke,’ was
published in seven volumes by the Berlin Academy
of Sciences (1881-91). His ‘Vorlesungen
über Dynamik’ did not appear till 1866, long
after his death, and later in 1895, his essay,
‘Uber die vierfach periodischen Functionen
Zweier Variabeln’ was published in Latin.
Consult Königsberger, ‘Carl Gustav Jacob
Jacobi’ (Leipzig 1904).