Geodesic
On Sums of Range Symmetric Matrices in Minkowski Space
Bulletin of the Malaysian Mathematical Society, Tome 25 (2002) no. 2 Cet article a éte moissonné depuis la source Bulletin of the Malaysian Mathematical Society website

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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. 
@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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TI  - On
                        Sums of Range Symmetric Matrices in Minkowski Space
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UR  - http://geodesic.mathdoc.fr/item/BMMS_2002_25_2_a4/
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%A D. Krishnaswamy
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                        Sums of Range Symmetric Matrices in Minkowski Space
%J Bulletin of the Malaysian Mathematical Society
%D 2002
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%U http://geodesic.mathdoc.fr/item/BMMS_2002_25_2_a4/
%F BMMS_2002_25_2_a4
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/