Geodesic
Coalescence of Difans and Diwheels
Bulletin of the Malaysian Mathematical Society, Tome 30 (2007) no. 1 Cet article a éte moissonné depuis la source Bulletin of the Malaysian Mathematical Society website

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A directed graph G is nonderogatory if its adjacency matrix A is nonderogatory, i.e., the characteristic polynomial of A is equal to the minimal polynomial of A . We analyze the problem whether the coalescence of difans and diwheels is nonderogatory. Also, a formula for the characteristic polynomial of the coalescence of two directed graphs is presented.
Classification : 05C50. 
@article{BMMS_2007_30_1_a5,
     author = {Diego Bravo and Juan Rada},
     title = {Coalescence of {Difans} and {Diwheels}},
     journal = {Bulletin of the Malaysian Mathematical Society},
     year = {2007},
     volume = {30},
     number = {1},
     url = {http://geodesic.mathdoc.fr/item/BMMS_2007_30_1_a5/}
}
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AU  - Diego Bravo
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JO  - Bulletin of the Malaysian Mathematical Society
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VL  - 30
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UR  - http://geodesic.mathdoc.fr/item/BMMS_2007_30_1_a5/
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%A Diego Bravo
%A Juan Rada
%T Coalescence of Difans and Diwheels
%J Bulletin of the Malaysian Mathematical Society
%D 2007
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%N 1
%U http://geodesic.mathdoc.fr/item/BMMS_2007_30_1_a5/
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Diego Bravo; Juan Rada. Coalescence of Difans and Diwheels. Bulletin of the Malaysian Mathematical Society, Tome 30 (2007) no. 1. http://geodesic.mathdoc.fr/item/BMMS_2007_30_1_a5/