S. K. Voronina, “A necessary condition for the system of eigen- and associated functions of an ordinary differential operator to be a basis in <nobr>$L_2(0,1)$</nobr>”, Differ. Uravn., 1978, Volume 14, Number 3,Pages <nobr>407

Ordinary Differential Equations

A necessary condition for the system of eigen- and associated functions of an ordinary differential operator to be a basis in $L_2(0,1)$

S. K. Voronina

Lomonosov Moscow State University

UDC: 517.927.26

Received: 14.06.1977