Real entire functions with real zeros and a conjecture of Wiman
arXiv:math/0207229 · doi:10.1007/s00039-003-0437-4
Abstract
If f is a real entire function and ff" has only real zeros then f belongs to the Laguerre-Polya class, the closure of the set of real polynomials with real zeros. This result completes a long line of development originating from a conjecture of Wiman in 1914.
17 pages, LaTeX