On polynomials sharing preimages of compact sets

**Hora de inicio:** 13:00. **Hora de fin:** 14:00.

In the talk, using some ideas of approximation theory, we

give a solution of

the following problem: under what conditions on infinite compact

subsets K_1 and

K_2 of the complex plane and polynomials f_1, f_2 the preimages f_1^{-1}\{K_1\}

and f_2^{-1}\{K_2\} coincide