For every finite Abelian group Γ and for all , if there exists a solution of the equation in non-negative integers , where are positive integers, then the number of such solutions is estimated from below in the best possible way.
@article{bwmeta1.element.bwnjournal-article-doi-10_4064-cm6145-12-2015,
author = {Maciej Zakarczemny},
title = {Number of solutions in a box of a linear equation in an Abelian group},
journal = {Colloquium Mathematicae},
volume = {144},
year = {2016},
pages = {17-22},
zbl = {06545374},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-cm6145-12-2015}
}
Maciej Zakarczemny. Number of solutions in a box of a linear equation in an Abelian group. Colloquium Mathematicae, Tome 144 (2016) pp. 17-22. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-cm6145-12-2015/