“…Later it was sequentially studied for matrix algebras in [2,25,26] and for operator algebras in [19,23,24,27,32]. Applying the powerful techniques on functional identities (see surveys [10,12]) the problem of character-izing maps preserving zero Lie products was solved for many classes of rings [4,5,8,11,14,21], in particular prime rings [8,11] and matrix rings over unital rings [4].…”