%0 Journal Article %A Beibut Sh. Kulpeshov %A Sergey V. Sudoplatov %T Variations of rigidity for ordered theories %J The Bulletin of Irkutsk State University. Series Mathematics %D 2024 %P 129-144 %V 48 %I mathdoc %U http://geodesic.mathdoc.fr/item/IIGUM_2024_48_a8/ %G en %F IIGUM_2024_48_a8