Wolfgang Hahn
Wolfgang Hahn (April 30, 1911 – January 10, 1998) was a German mathematician who worked on special functions, in particular orthogonal polynomials. He introduced Hahn polynomials, Hahn difference, Hahn q-addition (or  Jackson-Hahn-Cigler q-addition), and the Hahn–Exton q-Bessel function. He was an honorary member of the Austrian Mathematical Society. References

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Pictures of Wolfgang Hahn from Oberwolfach

1911 births
1998 deaths
Academic staff of the Technical University of Braunschweig
20th-century German mathematicians
Q-analogs