2016/05/21 by Fahad Bin Mortuza, Mortuza, Fahad Bin
Computer Science · #Advanced Graph Theory Research #Combinatorics (math.CO) #Complexity and Algorithms in Graphs #Data Structures and Algorithms (cs.DS) #Discrete Mathematics (cs.DM) #FOS: Computer and information sciences #FOS: Mathematics #Group Theory (math.GR) #Interconnection Networks and Systems
paper · pdf · doi:10.48550/arxiv.1605.09190
openalex publication_date 2016/05/21 · openalex created_date 2022/10/01 · openalex updated_date 2026/07/28
In this paper, we show the existence of a polynomial time graph isomorphism algorithm for all graphs excluding graphs that are locally trianglefree. This particular class of graphs allows to divide the graph into neighbourhood sub-graph where each of induced sub-graph (neighbourhood) has at least 2 vertices. We construct all possible permutations for each induced sub-graph using a search tree. We construct automorphisms of subgraphs based on these permutations. Finally, we decide isomorphism through automorphisms . The author expects that the solution, present in this paper, may lead to a faster algorithm for the general case of graph isomorphism (using " barycentric subdivision" ). The paper might affect group isomorphism also as we may construct graphs (corresponds to a particular group) in way so we can avoid it to be a triangle free graph. Since,for a given group G , each choice of a generating set will give a different Cayley graph.