Geodesic
On Sums of Range Symmetric Matrices in Minkowski Space
Bulletin of the Malaysian Mathematical Society, Tome 25 (2002) no. 2 
AR. Meenakshi; D. Krishnaswamy. On
                        Sums of Range Symmetric Matrices in Minkowski Space. Bulletin of the Malaysian Mathematical Society, Tome 25 (2002) no. 2. http://geodesic.mathdoc.fr/item/BMMS_2002_25_2_a4/
@article{BMMS_2002_25_2_a4,
     author = {AR. Meenakshi and D. Krishnaswamy},
     title = {On
                        {Sums} of {Range} {Symmetric} {Matrices} in {Minkowski} {Space}},
     journal = {Bulletin of the Malaysian Mathematical Society},
     year = {2002},
     volume = {25},
     number = {2},
     url = {http://geodesic.mathdoc.fr/item/BMMS_2002_25_2_a4/}
}
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                        Sums of Range Symmetric Matrices in Minkowski Space
%J Bulletin of the Malaysian Mathematical Society
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Voir la notice de l'article provenant de la source Bulletin of the Malaysian Mathematical Sciences Society website

We give necessary and sufficient condition for the sums of range symmetric matrices to be range symmetric in Minkowski space m . As an application it is shown that the sum and parallel sum of parallel summable range symmetric matrices are range symmetric.