Geodesic
A Criterion for Taylor Summability of Fourier Series
Canadian mathematical bulletin, Tome 22 (1979) no. 3, pp. 345-350

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Let {ank} be a matrix defined by 1 and n taking only non-negative integer values.Let f(x) ∈ L [0, 2π] and be periodic with period 2π outside this interval. Let the Fourier series associated with the function f(x) be given by and let where s is a constant. 
Holland, A. S. B.; Sahney, B. N.; Tzimbalario, J. A Criterion for Taylor Summability of Fourier Series. Canadian mathematical bulletin, Tome 22 (1979) no. 3, pp. 345-350. doi: 10.4153/CMB-1979-043-8
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     author = {Holland, A. S. B. and Sahney, B. N. and Tzimbalario, J.},
     title = {A {Criterion} for {Taylor} {Summability} of {Fourier} {Series}},
     journal = {Canadian mathematical bulletin},
     pages = {345--350},
     year = {1979},
     volume = {22},
     number = {3},
     doi = {10.4153/CMB-1979-043-8},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1979-043-8/}
}
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