By using the properties of Kloosterman sum and Dirichlet character, an optimal upper bound estimate of incomplete Cochrane sum is given.
@article{bwmeta1.element.doi-10_1515_math-2017-0068, author = {Yuankui Ma and Wen Peng and Tianping Zhang}, title = {Upper bound estimate of incomplete Cochrane sum}, journal = {Open Mathematics}, volume = {15}, year = {2017}, pages = {852-858}, language = {en}, url = {http://dml.mathdoc.fr/item/bwmeta1.element.doi-10_1515_math-2017-0068} }
Yuankui Ma; Wen Peng; Tianping Zhang. Upper bound estimate of incomplete Cochrane sum. Open Mathematics, Tome 15 (2017) pp. 852-858. http://gdmltest.u-ga.fr/item/bwmeta1.element.doi-10_1515_math-2017-0068/