Abstract
We firstly summarize the related literature aboutBr,s,t,u-summability of double sequence spaces and almostBr,s,t,u-summable double sequence spaces. Then we characterize some new matrix classes ofLs′:Cf,BLs′:Cf, andLs′:BCfof four-dimensional matrices in both cases of0<s′≤1and1<s′<∞, and we complete this work with some significant results.
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