The number of representations of a positive integer by each of the octonary quadratic forms
$x_1^2 +x_2^2 +3x_3^2 +3x_4^2 +3x_5^2 +3x_6^2 +3x_7^2 +3x_8^2$, $x_1^2 +x_2^2 +x_3^2 +x_4^2 +3x_5^2 +3x_6^2 +3x_7^2 +3x_8^2$, $x_1^2 +x_2^2 +x_3^2 +x_4^2 +x_5^2 +x_6^2 +3x_7^2 +3x_8^2$
is determined.
@article{1285679145,
author = {Alaca, \c Saban and Williams, Kenneth S.},
title = {The number of representations of a positive integer by certain octonary quadratic forms},
journal = {Funct. Approx. Comment. Math.},
volume = {42},
number = {1},
year = {2010},
pages = { 45-54},
language = {en},
url = {http://dml.mathdoc.fr/item/1285679145}
}
Alaca, Şaban; Williams, Kenneth S. The number of representations of a positive integer by certain octonary quadratic forms. Funct. Approx. Comment. Math., Tome 42 (2010) no. 1, pp. 45-54. http://gdmltest.u-ga.fr/item/1285679145/