On the fine spectrum of the operator B(r,s,t)B(r,s,t) over the sequence spaces ℓpℓp and bvp,(1<p<∞)bvp,(1<p<∞)

The main purpose of this paper is to determine the fine spectrum with respect to the Goldberg’s classification of the operator B(r,s,t)B(r,s,t) defined by a triple band matrix over the sequence spaces ℓpℓp and bvpbvp with 1