Changes between Initial Version and Version 1 of Ticket #14619, comment 7
 Timestamp:
 05/20/13 13:24:09 (6 years ago)
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Ticket #14619, comment 7
initial v1 6 6 what do you mean by "certificate"? 7 7 8 There is in fact an dalgebraic certificate of distance regularity, that is, the adjacency matrix A_k of the distance k graph of the original graph G is a polynomial in A_1 (the adjacency matrix of G). And these polynomials can be computed from the "intersection arrays". But that's a long story.8 There is in fact an algebraic certificate of distance regularity, that is, the adjacency matrix A_k of the distance k graph of the original graph G is a polynomial in A_1 (the adjacency matrix of G). And these polynomials can be computed from the "intersection arrays". But that's a long story.