Özdemir, Halim; Sarduvan, Murat; Güler, Nesrin
(ELSEVIER SCIENCE INC, 2009)
Let T-1 and T-2 be two nonzero commuting n x n tripotent matrices and c(1), c(2) two nonzero complex numbers. Necessary and sufficient conditions for the tripotency and the idempotency of c(1)T(1) + c(2)T(2) are obtained. ...