%0 Journal Article %A V. V. Nesterov %T Extraction of small rank unipotent elements in $\mathrm{GL}(4,K)$ %J Zapiski Nauchnykh Seminarov POMI %D 2020 %P 134-148 %V 492 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_2020_492_a9/ %G ru %F ZNSL_2020_492_a9