FILOMAT, vol.31, no.6, pp.1769-1771, 2017 (SCI-Expanded)
Let L be an algebra generated by the commuting independent nests, M is an ultra-weakly closed subalgebra of B(H) which contains alg L and phi is a norm continuous linear mapping from alg L into M. In this paper we will show that a norm continuous linear derivable mapping at zero point from Al 1 L to M is a derivation.