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Tamtam Proceedings - lamsin

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A new adjacency list-matrix for graphrepresentationA. HlaouiDépartement d’informatiqueUniversité de SherbrookeSherbrookeCanadaadel.hlaoui@usherbrooke.caRÉSUMÉ.ABSTRACT. In this paper we present a new graph representation, the adjacency list-matrix, whichtakes advantages and avoids drawbacks of the two foremost classical graph representations, theadjacency matrix and the adjacency lists structure. The adjacency list-matrix is an n × n matrixwhich may be applied in many combinatorial problems. It is in compact form allows rapid informationextraction. Like the adjacency list, the adjacency list-matrix provides a neighbour listing in one stepper neighbour. Moreover, the new representation allows the edge insertion (resp. deletion) operationin one step as the adjacency matrix. We also describe a theoretical comparison between the classicalrepresentations and the proposed one. The comparison shows that the adjacency list-matrix is aninteresting tool for representing graphs and a serious candidate to join the set of classical graphrepresentations.MOTS-CLÉS :KEYWORDS : Graph representation, adjacency matrix, adjacency lists.589 TAMTAM –Tunis– 2005

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