New nonexistences by Makhnev and Paduchikh - Githubissues

jaanos / sage-drg

A Sage package for checking feasibility of distance-regular graph and association scheme parameter sets

MIT License

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New nonexistences by Makhnev and Paduchikh #7

Open jaanos opened 2 years ago

jaanos commented 2 years ago

According to the abstract, http://journal.imm.uran.ru/2022-v.28-1-pp.199-208 seems to imply the following new nonexistences:

{s³ + 2s², s³ + 2s² - 1, s²(r - 1)/r, 1; 1, s²/r, s³ + 2s² - 1, s³ + 2s²} (feasible when s and r | s² are not both even)
{33, 32, 6 - μ, 1; 1, μ, 32, 33}, μ = 1, 2, 3
{32, 27, 10, 1; 1, 2, 27, 32}

I can't seem to access the full text to verify the results.