Two results are proved: (1) In PG(3, q), q=2 h, h>~3, every q3-arc can be uniquely completed to a (q + 1)3-arc. (2) In PG(4, q), q = 2", h ~> 3, every (q + 1)4-arc is a normal rational curve. ## 1. In~oduction We assume throughout this paper that the base field GF(q) is of order q = 2 h, where h i
Characterization of {2(q+1)+2,2;t,q}-minihypers in PG(t,q) (t⩾3,qϵ{3,4})
✍ Scribed by Noboru Hamada; Tor Helleseth; Øyvind Ytrehus
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 677 KB
- Volume
- 115
- Category
- Article
- ISSN
- 0012-365X
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✦ Synopsis
Hamada, N., T. Helleseth and 8. Ytrehus, Characterization of {2(q + 1) + 2, 2; t, q]-minihypers in PG(t, q) (t>3, q6{3,4}), Discrete Mathematics 115 (1993) 175-185.
A set F offpoints in a finite projective geometry PG(t, q) is an (L m; t, q}-minihyper if m (>O) is the largest integer such that all hyperplanes in PG(t, q) contain at least m points in F. Hamada and Deza (1988) characterized all {2(q + 1) +2,2; t, q}-minihypers for t > 3, q> 5. Hamada (1987Hamada ( , 1989) also determined the cases of t = 2, q > 3. In this paper we characterize {2(q + 1) + 2,2; t, q}-minihypers for t 2 3, q E{ 3,4}. In addition to the previously known constructions, we describe a new { 10, 2; 3,
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