Quasi-symmetric 2,3,4-designs

DOI10.1007/BF02579306zbMath0655.05012OpenAlexW2016110472MaRDI QIDQ1109036

Sharad S. Sane, Mohan S. Shrikhande

Publication date: 1987

Published in: Combinatorica (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.1007/bf02579306

zbMATH Keywords

block graphsblock designsQuasi-symmetric designst-designsWitt- Lüneburg design

Mathematics Subject Classification ID

Combinatorial aspects of block designs (05B05) Combinatorial aspects of finite geometries (05B25)

Related Items (18)

Non-existence of quasi-symmetric designs with restricted block graphs ⋮ A note on triangle-free quasi-symmetric designs ⋮ Non-symmetric nearly triply regular designs ⋮ A new upper bound on the parameters of quasi-symmetric designs ⋮ Quasi-symmetric designs with the difference of block intersection numbers two ⋮ An elementary derivation of the annihilator polynomial for extremal \((2s+1)\)-designs ⋮ \(t\)-designs with few intersection numbers ⋮ A short proof of a conjecture on quasi-symmetric 3-designs ⋮ On the characterisation of AG\((n,q)\) by its parameters as a nearly triply regular design ⋮ Inequalities and bounds for quasi-symmetric 3-designs ⋮ Nearly triply regular DRAD's of \(RH\) type ⋮ Conditions for the parameters of the block graph of quasi-symmetric designs ⋮ Finiteness Results in Triangle‐Free Quasi‐Symmetric Designs ⋮ Unnamed Item ⋮ Some characterizations of quasi-symmetric designs with a spread ⋮ Regular two-distance sets ⋮ Non existence of triangle free quasi-symmetric designs. ⋮ \((2s-1)\)-designs with \(s\) intersection numbers

Cites Work

• A survey of some problems in combinatorial designs - a matrix approach
• Finiteness questions in quasi-symmetric designs
• The structure of triangle-free quasi-symmetric designs
• The family of t-designs. Part I
• Designs with no three mutually disjoint blocks
• On tight 4-designs
• On t-designs
• Near-regularity conditions for designs
• The family of t-designs. II
• Extending symmetric designs
• The nonexistence of ovals in a projective plane of order 10

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