On the zeros of derivatives of balanced trigonometric polynomials. (English) Zbl 0381.30013
MSC:
30D20 | Entire functions of one complex variable (general theory) |
30C15 | Zeros of polynomials, rational functions, and other analytic functions of one complex variable (e.g., zeros of functions with bounded Dirichlet integral) |
42A05 | Trigonometric polynomials, inequalities, extremal problems |