Al-Dolat, Mohammed; Jaradat, Imad; Baleanu, Dumitru
(2020-07-06)
In this work, we provide upper and lower bounds for the numerical radius of an nxn off-diagonal operator matrix, which extends some results by Abu-Omar and Kittaneh (Stud. Math. 216:69-75, 2013; Linear Algebra Appl. ...