id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
ejpam-2371	Shukurov, Aydin	Simpler Proof of the Ringrose's Characterization of Compact Operators	2015	3	.pdf	application/pdf	917	61	66	The aim of this note is to give short, simpler and elementary proof of one characterization of compact operators via orthonormal sequences, which, hopefully will make this fact more accessible to nonspecialists and to a wide audience (especially to students). Key Words and Phrases: orthonormal sequence and orthonormal bases in Hilbert space, Ringrose’s characterization of compact operators, linear operators, compact operators 1.	cache/ejpam-2371.pdf	txt/ejpam-2371.txt