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We estimate the pointwise approximation of periodic functions belonging to L-p(omega)(beta)-class, where omega is an integral modulus of continuity type function associated with f, using product means of the Fourier series of f generated by the product of two general linear operators. We also discuss the case p = 1 separately. This case has not been mentioned in the earlier results given by various authors. The deviations obtained in our theorems are free from p and more sharper than the earlier results.

Approximation of periodic integrable functions in terms of modulus of continuity