[Authors] S. V. Bankevich, A. I. Nazarov [Title] On the Polya-Szeg\"o inequality generalization for one-dimensional functionals [AMS Subj-class] 49K05 Free problems in one independent variable 49N99 Calculus of variations and optimal control; optimization [Keywords] rearrangements, Lavrentiev's phenomenon [Abstract] We consider the Polya-Szeg\"o type weighted inequality. We prove this inequality for monotone rearrangement and for Steiner's symmetrization. [Comments] Russian, 6 pp. [Contact e-mail] al.il.nazarov@gmail.com