Semilattice orders on the homomorphic images of the Rédei semigroup
✍ Scribed by Kamilla Kátai-Urbán; Árpád Tritz
- Publisher
- Springer Netherlands
- Year
- 2007
- Tongue
- English
- Weight
- 296 KB
- Volume
- 55
- Category
- Article
- ISSN
- 0031-5303
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📜 SIMILAR VOLUMES
Lattice orders on the semigroup ring of a positive rooted monoid are constructed, and it is shown how to make the monoid ring into a lattice-ordered ring with squares positive in various ways. It is proved that under certain conditions these are all of the lattice orders that make the monoid ring in
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)Â2 and ( p&1)Â2+ 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)Â2+ 1 3 -p.