Geodesic
Note on the degree of concavity of the determinant on sets of positive definite quadratic forms.
Aequationes mathematicae, Tome 33 (1987), pp. 57-61.

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Mots-clés : determinant inequalities for matrices, quadratic forms, Minkowski reduced matrices, reduction theory 
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     author = {G. Rousseau},
     title = {Note on the degree of concavity of the determinant on sets of positive definite quadratic forms.},
     journal = {Aequationes mathematicae},
     pages = {57--61},
     publisher = {mathdoc},
     volume = {33},
     year = {1987},
     zbl = {0631.10018},
     url = {http://geodesic.mathdoc.fr/item/AM2_1987__33_137202/}
}
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G. Rousseau. Note on the degree of concavity of the determinant on sets of positive definite quadratic forms.. Aequationes mathematicae, Tome 33 (1987), pp. 57-61. http://geodesic.mathdoc.fr/item/AM2_1987__33_137202/