Geodesic
The equality cases for the inequalities of Oppenheim and Schur for positive semi-definite matrices
Czechoslovak Mathematical Journal, Tome 59 (2009) no. 1, pp. 197-206 Cet article a éte moissonné depuis la source Czech Digital Mathematics Library

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In this paper, necessary and sufficient conditions for equality in the inequalities of Oppenheim and Schur for positive semidefinite matrices are investigated.
In this paper, necessary and sufficient conditions for equality in the inequalities of Oppenheim and Schur for positive semidefinite matrices are investigated.
Classification : 15A45, 15A57
Keywords: Oppenheim's inequality; Schur's inequality; positive semidefinite matrix; Hadamard product 
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     author = {Zhang, Xiao-Dong and Ding, Chang-Xing},
     title = {The equality cases for the inequalities of {Oppenheim} and {Schur} for positive semi-definite matrices},
     journal = {Czechoslovak Mathematical Journal},
     pages = {197--206},
     year = {2009},
     volume = {59},
     number = {1},
     mrnumber = {2486625},
     zbl = {1224.15042},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMJ_2009_59_1_a13/}
}
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Zhang, Xiao-Dong; Ding, Chang-Xing. The equality cases for the inequalities of Oppenheim and Schur for positive semi-definite matrices. Czechoslovak Mathematical Journal, Tome 59 (2009) no. 1, pp. 197-206. http://geodesic.mathdoc.fr/item/CMJ_2009_59_1_a13/