Fritz Carlson

Fritz David Carlson (23 July 1888 – 28 November 1952) was a Swedish mathematician. After the death of Torsten Carleman, he headed the Mittag-Leffler Institute.

Carlson's contributions to analysis include Carlson's theorem, the Polyá–Carlson theorem on rational functions, and Carlson's inequality


 * $$ \left( \sum_{n=1}^\infty |a_n|\right)^4 \leq \pi^2 \sum_{n=1}^\infty |a_n|^2 \, \sum_{n=1}^\infty n^2 |a_n|^2~.$$

In number theory, his results include Carlson's theorem on Dirichlet series.

Hans Rådström, Germund Dahlquist, and Tord Ganelius were among his students.