గణితశాస్త్రం ఎటర్నా
అందరికి ప్రవేశం

నైరూప్య

On the Closed Systems in Banach Spaces

T.M.Ahmedov and T.I. Najafov

Some notion of closeness of systems in Banach spaces that leave the basicity properties of the considered systems are introduced. The obtained results generalize many results known earlier