Add to ORKGX1 colouring of S:The points of any external line to X have different colours. X2 colouring of S:The points of any tangent to X have different colours. X3 colouring of S: Entrato in Redazione il 10 novembre 1997
AbstractIt is known that the number of colours χ(R3) necessary to colour each point of 3-space so th...
AbstractLower bounds are given for the number of lines blocked by a set of q + 2 points in a project...
AbstractBy counting arguments we show that certain partitions of the points of finite projective and...
Let (S, L) be an either linear or semilinear space and X ⊂ S. Starting from X we define three types ...
ing sets, that is blocking sets not containing a proper subset that is still a blocking set. The sma...
A constrained colouring or, more specifically, an (α, β)-colouring of a hypergraph H, is an assignme...
Abstract. This paper studies problems related to visibility among points in the plane. A point x blo...
AbstractIt is shown that in every n-colouring ((n − 1)-colouring) of a projective plane (affine plan...
A Steiner system S(2, 4, v) is a v-element set V together with a collection B of 4-subsets of V cal...
This paper studies problems related to visibility among points in the plane. A point x blocks two po...
S Affine blocking sets or intersection sets Simeon Ball Faculty of Discrete Mathematics Technica...
summary:What is the least number of colours which can be used to colour all points of the real Eucli...
Lower bounds are given for the number of lines blocked by a set of q + 2 points in a projective plan...
We survey recent results concerning the size of blocking sets in desarguesian projective and affine ...
AbstractIn this paper we introduce the new concept of proper blocking sets B infinite projective spa...
AbstractIt is known that the number of colours χ(R3) necessary to colour each point of 3-space so th...
AbstractLower bounds are given for the number of lines blocked by a set of q + 2 points in a project...
AbstractBy counting arguments we show that certain partitions of the points of finite projective and...
Let (S, L) be an either linear or semilinear space and X ⊂ S. Starting from X we define three types ...
ing sets, that is blocking sets not containing a proper subset that is still a blocking set. The sma...
A constrained colouring or, more specifically, an (α, β)-colouring of a hypergraph H, is an assignme...
Abstract. This paper studies problems related to visibility among points in the plane. A point x blo...
AbstractIt is shown that in every n-colouring ((n − 1)-colouring) of a projective plane (affine plan...
A Steiner system S(2, 4, v) is a v-element set V together with a collection B of 4-subsets of V cal...
This paper studies problems related to visibility among points in the plane. A point x blocks two po...
S Affine blocking sets or intersection sets Simeon Ball Faculty of Discrete Mathematics Technica...
summary:What is the least number of colours which can be used to colour all points of the real Eucli...
Lower bounds are given for the number of lines blocked by a set of q + 2 points in a projective plan...
We survey recent results concerning the size of blocking sets in desarguesian projective and affine ...
AbstractIn this paper we introduce the new concept of proper blocking sets B infinite projective spa...
AbstractIt is known that the number of colours χ(R3) necessary to colour each point of 3-space so th...
AbstractLower bounds are given for the number of lines blocked by a set of q + 2 points in a project...
AbstractBy counting arguments we show that certain partitions of the points of finite projective and...