Kibe K; Kaunda Z; Kinyanjui J
(Kirinyaga University, 2024-09)
Two operators F and G are considered unitary quasi-equivalent if there exists a unitary operator
U satisfying the conditions F
∗F = UG∗GU∗
and FF∗ = UGG∗U
∗
. This concept was introduced
in 1996 under the idea of ...