منابع مشابه
Arcs with Large Conical Subsets
We classify the arcs in PG(2, q), q odd, which consist of (q + 3)/2 points of a conic C and two points not on te conic but external to C, or (q + 1)/2 points of C and two additional points, at least one of which is an internal point of C. We prove that for arcs of the latter type, the number of points internal to C can be at most 4, and we give a complete classification of all arcs that attain ...
متن کاملArcs with Large Conical Subsets in Desarguesian Planes of Even Order
We give an explicit classification of the arcs in PG(2, q) (q even) with a large conical subset and excess 2, i.e., that consist of q/2 + 1 points of a conic and two points not on that conic. Apart from the initial setup, the methods used are similar to those for the case of odd q, published earlier (Electronic Journal of Combinatorics, 17, #R112).
متن کاملNew Large (n, r)-arcs in PG(2, q)
An $(n, r)$-arc is a set of $n$ points of a projective plane such that some $r$, but no $r+1$ of them, are collinear. The maximum size of an $(n, r)$-arc in $PG(2, q)$ is denoted by $m_r(2,q)$. In this paper we present a new $(184,12)$-arc in PG$(2,17),$ a new $(244,14)$-arc and a new $(267,15$)-arc in $PG(2,19).$
متن کاملLarge 2-transitive arcs
The projective planes of order n with a collineation group acting 2-transitively on an arc of length v, with n > v n/2, are investigated and several new examples are provided. © 2006 Elsevier Inc. All rights reserved.
متن کاملUpper Bound Analysis of Tube Extrusion Process Through Rotating Conical Dies with Large Mandrel Radius
In this paper, an upper bound approach is used to analyze the tube extrusion process through rotating conical dies with large mandrel radius. The material under deformation in the die and inside the container is divided to four deformation zones. A velocity field for each deformation zone is developed to evaluate the internal powers and the powers dissipated on all frictional and velocity disco...
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ژورنال
عنوان ژورنال: The Electronic Journal of Combinatorics
سال: 2010
ISSN: 1077-8926
DOI: 10.37236/384