Séminaire Lotharingien de Combinatoire, 82B.105 (2019), 8 pp.

Janoš Vidali

Computing distance-regular graph and association scheme parameters in SageMath with sage-drg

Abstract. The sage-drg package for the SageMath computer algebra system has been originally developed for computation of parameters of distance-regular graphs. Recently, its functionality has been extended to handle general association schemes. The package has been used to obtain nonexistence results for both distance-regular graphs and Q-polynomial association schemes, mostly using the triple intersection numbers technique.

Received: November 15, 2018. Accepted: February 17, 2019. Final version: April 1, 2019.

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