Djellouli, Ghouti; Messirdi, Sanaa; Messirdi, Bekkai
(Int. J. Contemp. Math. Sciences, 2010)
The purpose of this paper is to introduce some new metrics on the
set C(H) of closed densely defined operators on a Hilbert space H and
we characterize the closure of the subset of bounded elements of C(H)
for these ...