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- Vasco Moço Mano, Enide Andrade Martins, Luís António de Almeida Vieira
- Electronic Notes in Discrete Mathematics
- 2011

We consider a strongly regular graph, G, and associate a three dimensional Eu-clidean Jordan algebra, V, to the adjacency matrix A of G. Then, by considering convergent series of Hadamard powers of the idempotents of the unique complete system of orthogonal idempotents of V, we establish new feasibility conditions for the existence of strongly regular… (More)

- Vasco Moço Mano, António de Almeida Vieira
- 2011

—We consider a strongly regular graph, G, with adjacency matrix A, and associate a three dimensional Eu-clidean Jordan algebra to A. Then, by considering convergent series of Hadamard powers of the idempotents of the unique complete system of orthogonal idempotents of the Euclidean Jordan algebra associated to A, we establish new admissibility conditions… (More)

- Vasco Moço Mano
- 2014

—Considering the Euclidean Jordan algebra of the real symmetric matrices endowed with the Jordan product and the inner product given by the usual trace of matrices, we construct an alternating Schur series with an element of the Jordan frame associated to the adjacency matrix of a strongly regular graph. From this series we establish necessary conditions… (More)

We consider a strongly regular graph, G, and associate a three dimensional Euclidean Jordan algebra, V, to its adjacency matrix A. Then, by considering binomial series of Hadamard powers of the idem-potents of the unique complete system of orthogonal idempotents of V associated to A, we establish feasibility conditions for the existence of strongly regular… (More)

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