Let x, y be two distinct real numbers. An {x, y}-matrix is a matrix whose entries are either x or y. We determine the possible numbers of x’s in an {x, y}-matrix with a given rank. Our proof is constructive.
@article{bwmeta1.element.doi-10_1515_math-2017-0079,
author = {Chao Ma},
title = {Possible numbers ofx's in an {x,y}-matrix with a given rank},
journal = {Open Mathematics},
volume = {15},
year = {2017},
pages = {974-977},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.doi-10_1515_math-2017-0079}
}
Chao Ma. Possible numbers ofx’s in an {x,y}-matrix with a given rank. Open Mathematics, Tome 15 (2017) pp. 974-977. http://gdmltest.u-ga.fr/item/bwmeta1.element.doi-10_1515_math-2017-0079/