%0 Journal Article %A A. Sh. Shukurov %T About one type of sequences that are not a Schauder basis in Hilbert spaces %J Vestnik Udmurtskogo universiteta. Matematika, mehanika, kompʹûternye nauki %D 2015 %P 244-247 %V 25 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/VUU_2015_25_2_a7/ %G en %F VUU_2015_25_2_a7