On idempotency of linear combinations of idempotent matrices. - Halim Özdemir; Ahmet Yasar Özban (Appl. Math. Comput., 2004)

On linear combinations of two tripotent, idempotent, and involutive matrices. - Murat Sarduvan; Halim Özdemir (Appl. Math. Comput., 2008)

On idempotency and tripotency of linear combinations of two commuting tripotent matrices. - Halim Özdemir; Murat Sarduvan; Ahmet Yasar Özban; Nesrin Güler (Appl. Math. Comput., 2009)

On a disjoint idempotent decomposition for linear combinations produced from n commutative tripotent matrices. - Halim Özdemir; Emre Kisi; Mahmut Uç (Appl. Math. Comput., 2012)

On the best approximate (P, Q)-orthogonal symmetric and skew-symmetric solution of the matrix equation AXB=C. - Murat Sarduvan; Sinem Simsek; Halim Özdemir (J. Num. Math., 2014)

On the spectra of some combinations of two generalized quadratic matrices. - Tugba Petik; Halim Özdemir; Julio Benítez (Appl. Math. Comput., 2015)