Blocking sets with flag transitive collineation groups (Q1825431)
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scientific article; zbMATH DE number 4120887
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | Blocking sets with flag transitive collineation groups |
scientific article; zbMATH DE number 4120887 |
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Blocking sets with flag transitive collineation groups (English)
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1991
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Let S be a blocking set in a finite projective plane \(\Pi\). Let \(G\subseteq Aut \Pi\) fix S and be flag transitive on S. Then \(S=PG(2,q)\) is a Baer subplane of \(\Pi\) and \(PSL(3,q)\triangleleft G\), or \(S=U_ H(q)\) is a Hermitian unital in \(\Pi =PG(2,q^ 2)\) and \(PSU(3,q)\triangleleft G\).
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collineation group
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blocking set
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projective plane
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flag transitive
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