pith. sign in

arxiv: 1509.05933 · v6 · pith:VECAGBM4new · submitted 2015-09-19 · 🧮 math.CO

There is no (75,32,10,16) strongly regular graph

classification 🧮 math.CO
keywords graphthereregularimpliesproblemresultstronglyalgebraic
0
0 comments X
read the original abstract

We show that there is no (75,32,10,16) strongly regular graph. The result is obtained by a mix of algebraic and computational approaches. The main idea is to build large enough induced structure and apply the star complement technique. Our result implies that there is no regular two-graph on 76 vertices and no partial geometry with parameters pg(4,7,2). In particular, it implies that there is no (76,35,18,14) strongly-regular graph. In order to solve this classification problem we also develop an efficient algorithm for the problem of finding a maximal clique in a graph.

This paper has not been read by Pith yet.

discussion (0)

Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.