On supportless absorbing convex subsets in normed spaces
Tom 104 / 1993
Studia Mathematica 104 (1993), 279-284
DOI: 10.4064/sm-104-3-279-284
Streszczenie
It is proved that a separable normed space contains a closed bounded convex symmetric absorbing supportless subset if and only if this space may be covered (in its completion) by the range of a nonisomorphic operator.
