Degrees of the Approximation of Integrable Functions by Some Special Matrix Means of Fourier Series

Radosława Kranz, Aleksandra Rzepka, Ewa Sylwestrzak-Maślanka

We consider the pointwise and normwise approximation of function by some special matrix means of its Fourier series. The results corresponding to the theorem of Łenski and Szal in [5] and the results of Saini and Singh in [6] are shown. Some special cases as corollaries are also formulated.