%0 Journal Article %A M. V. Balashov %T The Lezanski -- Polyak -- Lojasiewicz inequality and the convergence of~the~gradient projection algorithm %J Izvestiya of Saratov University. Mathematics. Mechanics. Informatics %D 2023 %P 4-10 %V 23 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/ISU_2023_23_1_a0/ %G en %F ISU_2023_23_1_a0