Joseph Ludwig Raabe

Joseph Ludwig Raabe (15 May 1801 in Brody, Galicia – 22 January 1859 in Zürich, Switzerland) was a Swiss mathematician.

[1] As his parents were quite poor, Raabe was forced to earn his living from a very early age by giving private lessons.

He began to study mathematics in 1820 at the Polytechnicum in Vienna, Austria.

Raabe's test serves to determine the convergence or divergence of an infinite series, in some cases.

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