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EnglishRecently, Blokhuis and Metsch proved that a Desarguesian projective plane of square order q^2>=25 contains no minimal blocking q^3-set. Since for q=4 the existence is proved, the problem is open when q^2 =9, 16. In this paper we prove the theorem for q=9. Since the techniques are of combinatorial type, based on incidence properties, the result holds also in non-Desarguesian cases. The lenght of the proof shows the difficulty to treat this subject in a general finite projective plane.
http://hdl.handle.net/11697/15058| Titolo: | The non-existence of certain large minimal blocking sets |
| Autori interni: | INNAMORATI, STEFANO |
| Data di pubblicazione: | 1998 |
| Rivista: | MITTEILUNGEN AUS DEM MATHEMATISCHEN. SEMINAR GIESSEN |
| Abstract: | Recently, Blokhuis and Metsch proved that a Desarguesian projective plane of square order q^2>=25 contains no minimal blocking q^3-set. Since for q=4 the existence is proved, the problem is open when q^2 =9, 16. In this paper we prove the theorem for q=9. Since the techniques are of combinatorial type, based on incidence properties, the result holds also in non-Desarguesian cases. The lenght of the proof shows the difficulty to treat this subject in a general finite projective plane. |
| Handle: | http://hdl.handle.net/11697/15058 |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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