COMPTES RENDUS DE L ACADEMIE BULGARE DES SCIENCES, cilt.74, sa.7, ss.957-963, 2021 (SCI-Expanded)
In this paper, we consider some lacunary power series in the field K of formal Laurent series over a finite field F. We proved that the values of certain lacunary power series for the arguments from the set of Liouville numbers in the field K are either in F(x) or Liouville numbers, where F(x) is the quotient field of the polynomial ring F[x].