Tangency sets in PG(3, q)
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K. Metsch; L. Storme
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Article
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2008
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John Wiley and Sons
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English
β 165 KB
## Abstract A tangency set of PG __(d,q)__ is a set __Q__ of points with the property that every point __P__ of __Q__ lies on a hyperplane that meets __Q__ only in __P__. It is known that a tangency set of PG __(3,q)__ has at most $q^2+1$ points with equality only if it is an ovoid. We show that a