%0 Journal Article %T In memory of academician Ivan Vasilyevich Gaishun %J Trudy Instituta matematiki %D 2018 %P 3-5 %V 26 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/TIMB_2018_26_1_a0/ %G ru %F TIMB_2018_26_1_a0