Carl Severin Wigert (1871–1941) was a

Swedish Swedish or ' may refer to: Anything from or related to Sweden, a country in Northern Europe. Or, specifically: * Swedish language, a North Germanic language spoken primarily in Sweden and Finland ** Swedish alphabet, the official alphabet used by ...

mathematician who created

Stieltjes–Wigert polynomials In mathematics, Stieltjes–Wigert polynomials (named after Thomas Jan Stieltjes and Carl Severin Wigert) are a family of basic hypergeometric orthogonal polynomials in the basic Askey scheme, for the weight function : w(x) = \frac x^ \exp(-k^2\l ...

and worked on the divisor function, including correctly describing its maximal order of growth. Wigert proved that :

\limsup_\frac=\log2.

Selected publications

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References

* Swedish mathematicians 1871 births 1941 deaths {{Sweden-mathematician-stub