We introduce the notion of relative convergence by means of a four dimensional matrix in the sense of the power series method, which includes Abel's as well as Borel's methods, to prove a Korovkin type approximation theorem by using the test functions {1, y, z, y 2 + z 2 } and a double sequence of positive linear operators defined on modular spaces. We also endeavor to examine some applications related to this new type of approximation.
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Raj et al. (2019) studied this question.