The minimal number of lines intersected by a set of q + 2 points, blocking sets, and intersecting circles
نویسندگان
چکیده
منابع مشابه
Minimum blocking sets of circles for a set of lines in the plane
A circle C is occluded by a set of circles C1, . . . , Cn if every line that intersects C also intersects at least one of the Ci, i = 1, . . . , n. In this paper, we focus on determining the minimum number of circles that occlude a given circle assuming that all circles have radius 1 and their mutual distance is at least d. As main contribution of this paper, we present upper and lower bounds o...
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چکیده ندارد.
Blocking Sets Of External Lines To A Conic In PG(2, q), q ODD
We determine all point-sets of minimum size in PG(2, q), q odd that meet every external line to a conic in PG(2, q). The proof uses a result on the linear system of polynomials vanishing at every internal point to the conic and a corollary to the classification theorem of all subgroups of PGL(2, q).
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ژورنال
عنوان ژورنال: Journal of Combinatorial Theory, Series A
سال: 1989
ISSN: 0097-3165
DOI: 10.1016/0097-3165(89)90023-x