Hans Petersson (24 September 1902 in Bentschen – 9 November 1984 in Münster) was a German mathematician, known for his research on modular and automorphic forms.
[1] He introduced the Petersson inner product and is also known for the Ramanujan–Petersson conjecture.
He received his doctorate in 1925 from the University of Hamburg.
His thesis advisor was Erich Hecke.
[2] In a series of papers, Petersson used the Poincaré series to give a complete construction of all meromorphic functions and differentials on a compact Riemann surface.