We study subregular spreads of $PG(3,q)$, i.e. spreads obtained from a regular one reversing some (possibly none) reguli, proving that subregular spreads have an indicator set contained in two lines (the classical indicator sets of two regular spreads) and this indicator set union its directions is a rank 3 blocking set. Furthermore, we discuss some examples of rank 3 blocking sets associated with subregular spreads.
Subregular spreads and blocking sets / Bader, Laura; DE VITO, Paola. - In: RICERCHE DI MATEMATICA. - ISSN 1827-3491. - 63:(2014), pp. 347-353. [10.1007/s11587-014-0189-5]
Subregular spreads and blocking sets
BADER, LAURA;DE VITO, PAOLA
2014
Abstract
We study subregular spreads of $PG(3,q)$, i.e. spreads obtained from a regular one reversing some (possibly none) reguli, proving that subregular spreads have an indicator set contained in two lines (the classical indicator sets of two regular spreads) and this indicator set union its directions is a rank 3 blocking set. Furthermore, we discuss some examples of rank 3 blocking sets associated with subregular spreads.File in questo prodotto:
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