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On the Size of a Triple Blocking Set inPG(2, q)

✍ Scribed by Simeon Ball

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
318 KB
Volume
17
Category
Article
ISSN
0195-6698

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πŸ“œ SIMILAR VOLUMES

On the Size of a Double Blocking Set inP
On the Size of a Double Blocking Set inPG(2,q)
✍ Simeon Ball; Aart Blokhuis πŸ“‚ Article πŸ“… 1996 πŸ› Elsevier Science 🌐 English βš– 212 KB

We obtain lower bounds for the size of a double blocking set in the Desarguesian projective plane PG(2, q). These bounds are best possible for q Ο½ 11 and in the case q is a square. With the same technique we also exclude certain values for the size of an ordinary minimal blocking set.

On the Size of Set Systems on [n] Not Co
On the Size of Set Systems on [n] Not Containing Weak (r, Ξ”)-Systems
✍ VojtΔ›ch RΓΆdl; LuboΕ‘ Thoma πŸ“‚ Article πŸ“… 1997 πŸ› Elsevier Science 🌐 English βš– 286 KB

Let r 3 be an integer. A weak (r, 2)-system is a family of r sets such that all pairwise intersections among the members have the same cardinality. We show that for n large enough, there exists a family F of subsets of [n] such that F does not contain a weak (r, 2)-system and |F| 2 (1Γ‚3) } n 1Γ‚5 log

On the Size of the Smallest Non-Classica
On the Size of the Smallest Non-Classical Blocking Set of RΓ©dei Type in PG(2, p)
✍ AndrΓ‘s GΓ‘cs πŸ“‚ Article πŸ“… 2000 πŸ› Elsevier Science 🌐 English βš– 137 KB

We prove that the number of directions determined by a set of p points in AG(2, p), p prime, cannot be between ( p+3)Γ‚2 and ( p&1)Γ‚2+ 1 3 -p. This is equivalent to saying that besides the projective triangle, every blocking set of Re dei type in PG(2, p) has size at least 3( p&1)Γ‚2+ 1 3 -p.

The Influence of the Radiofrequency Exci
The Influence of the Radiofrequency Excitation and Conversion Pulses on the Lineshapes and Intensities of the Triple-Quantum MAS NMR Spectra of I = 3/2 Nuclei
✍ Amir Goldbourt; Shifi Kababya; Shimon Vega; P.K. Madhu πŸ“‚ Article πŸ“… 2000 πŸ› Elsevier Science 🌐 English βš– 157 KB

A rigorous examination of the various multiple-quantum magic angle spinning sequences is carried out with reference to sensitivity enhancement in the isotropic dimension and the lineshapes of the corresponding MAS peaks in the anisotropic dimension. An echo efficiency parameter is defined here, whic