Springer and the Iranian Mathematical Society (IMS)Bulletin of the Iranian Mathematical Society1017-060X43520171031Some rank equalities for finitely many tripotent matrices147914931037ENT.PetikSakarya University, Department of Mathematics, Sakarya, 54187, Turkey.H.OzdemirSakarya University, Department of Mathematics, Sakarya, 54187, Turkey.Journal Article20150706A rank equality is established for the sum of finitely many tripotent matrices via elementary block matrix operations. Moreover, by using this equality and Theorems 8 and 10 in [Chen M. and et al. On the open problem related to rank equalities for the sum of finitely many idempotent matrices and its applications, The Scientific World Journal 2014 (2014), Article ID 702413, 7 pages.], some other rank equalities for tripotent matrices are given. Furthermore, we obtain several rank equalities related to some special types of matrices, some of which are available in the literature, from the results established.http://bims.iranjournals.ir/article_1037_3ff83cd867821e50f12900bc578fc89c.pdf