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2019•Journal of Combinatorial DesignsRequires access

There is no (95, 40, 12, 20) strongly regular graph

Jernej Azarija, Tilen Marc

Open publisher page 8 citations

Abstract

Abstract We show that there is no (95, 40, 12, 20) strongly regular graph and, consequently, there is no (96, 45, 24, 18) strongly regular graph, no nontrivial regular two‐graph on 96 vertices, and no partial geometry pg(4, 9, 2). The main idea of the result is based on the star complement technique and requires a moderate amount of computation.

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What this paper is about

Abstract We show that there is no (95, 40, 12, 20) strongly regular graph and, consequently, there is no (96, 45, 24, 18) strongly regular graph, no nontrivial regular two‐graph on 96 vertices, and no partial geometry pg(4, 9, 2). The main idea of the result is based on the star complement technique and requires a moderate amount of computation.

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Available abstract

Abstract We show that there is no (95, 40, 12, 20) strongly regular graph and, consequently, there is no (96, 45, 24, 18) strongly regular graph, no nontrivial regular two‐graph on 96 vertices, and no partial geometry pg(4, 9, 2). The main idea of the result is based on the star complement technique and requires a moderate amount of computation.

Key concepts: Mathematics, Combinatorics, Strongly regular graph, Regular graph, Graph, Distance-regular graph, Complement graph, Cubic graph

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