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CATS
2008
13 years 9 months ago
On the Non-existence of Even Degree Graphs with Diameter 2 and Defect 2
Using eigenvalue analysis, it was shown by Erd
Mirka Miller, Minh Hoang Nguyen, Guillermo Pineda-...
COMBINATORICS
2000
138views more  COMBINATORICS 2000»
13 years 7 months ago
Quasi-Spectral Characterization of Strongly Distance-Regular Graphs
A graph with diameter d is strongly distance-regular if is distanceregular and its distance-d graph d is strongly regular. The known examples are all the connected strongly regu...
Miguel Angel Fiol
APPROX
2004
Springer
135views Algorithms» more  APPROX 2004»
14 years 1 months ago
The Diameter of Randomly Perturbed Digraphs and Some Applications.
The central observation of this paper is that if ǫn random arcs are added to any n-node strongly connected digraph with bounded degree then the resulting graph has diameter O(ln ...
Abraham Flaxman, Alan M. Frieze