Journal of Symbolic ComputationVolume 13, Issue 6, June 1992, Pages 677-681On graphical quintuple systemsAuthor links open overlay panelYeow Meng CheeShow moreShareCitehttps://doi.org/10.1016/S0747-7171(10)80016-1Get rights and contentUnder an Elsevier user licenseopen archiveIn this paper, we prove with the aid of symbolic computational tools, that there does not exist a non-trivial graphical 4-(λ, 5, ν) design for any λ and ν.Previous article in issueNext article in issueRecommended articlesCited by (0)Copyright © 1992 Academic Press Limited. Published by Elsevier Ltd. All rights reserved.