Anal. Theory Appl., 31 (2015), pp. 299-306.
Published online: 2017-07
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In this paper, we show that new modified double cosine trigonometric sums introduced in [1] are inappropriate, the class of double sequences $J_d$ introduced there is unusable for such sums and consequently the results obtained in it are completely incorrect. We here introduce appropriate modified double cosine trigonometric sums making the class $J_d$ usable considering a particular double cosine trigonometric series.
}, issn = {1573-8175}, doi = {https://doi.org/10.4208/ata.2015.v31.n3.7}, url = {http://global-sci.org/intro/article_detail/ata/4641.html} }In this paper, we show that new modified double cosine trigonometric sums introduced in [1] are inappropriate, the class of double sequences $J_d$ introduced there is unusable for such sums and consequently the results obtained in it are completely incorrect. We here introduce appropriate modified double cosine trigonometric sums making the class $J_d$ usable considering a particular double cosine trigonometric series.