On Approximation of Functions in the Generalized Zygmund Class Using $$(E,r)(N,q_n)$$ Mean Associated with Conjugate Fourier Series

In the past few decades, a number of researchers have studied the error estimation of functions in various function spaces and obtained some useful results by using various summability techniques due to their wide applicability in science and engineering. The present study aims to establish a result on degree of approximation of conjugate Fourier series of functions in the generalized Zygmund class by using Euler–Norlund product mean which generalizes several known results.