%0 Journal Article %A G. Rousseau %T Note on the degree of concavity of the determinant on sets of positive definite quadratic forms. %J Aequationes mathematicae %D 1987 %P 57-61 %V 33 %I mathdoc %U http://geodesic.mathdoc.fr/item/AM2_1987__33_137202/ %F AM2_1987__33_137202