A simple proof is given for a theorem by Milliken and Akdeniz (1977) about the difference of the Moore-Penrose inverses of two positive semi-definite matrices.
@article{urn:eudml:doc:40153,
title = {A new proof of the Millinen-Akdeniz theorem.},
journal = {Q\"uestii\'o},
volume = {13},
year = {1989},
pages = {81-82},
mrnumber = {MR1093613},
zbl = {1167.15302},
language = {en},
url = {http://dml.mathdoc.fr/item/urn:eudml:doc:40153}
}
Neudecker, Heinz. A new proof of the Millinen-Akdeniz theorem.. Qüestiió, Tome 13 (1989) pp. 81-82. http://gdmltest.u-ga.fr/item/urn:eudml:doc:40153/