2-local $ (\upvarphi, \uppsi) $-Derivations on Finite von Neumann Algebras
In this paper, I introduce the concept of $ (\upvarphi, \uppsi) $-finite von Neumann algebras and I show that if $ \mathscr{M} $ is a finite and $ (\upvarphi, \uppsi) $-finite von Neumann algebra togather with condition $ \{ \big( Δ(u+v)-Δ(u)-Δ(v)\big)^{*}\} \subseteq \uppsi(\mathscr{M}) $, then each (approximately) 2-local $ (\upvarphi, \uppsi) $-derivation $ δ$ on $ \mathscr{M} $, is a $ (\upvarphi, \uppsi) $-derivation.
math.OA↗