## Abstract A (Ξ½, __k__, __k__β1) near resolvable block design (NRBD) is __r__βrotational over a group __G__ if it admits __G__ as an automorphism group of order (Ξ½β1)/__r__ fixing exactly one point and acting semiregularly on the others. We give direct and recursive constructions for rotational NR
Constructions for near resolvable designs and BIBDs
β Scribed by Tran van Trung
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 355 KB
- Volume
- 7
- Category
- Article
- ISSN
- 1063-8539
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β¦ Synopsis
The purpose of this article is twofold. First, it is shown that classical inversive planes of even order can be used to construct a class of 2 -(2 2n +1, 2 n , 2 n -1) near resolvable designs, in which any two blocks have at most 2 points in common. Secondly, it is shown that a recursive construction method for BIBDs using resolvable BIBDs due to Shrikhande and Raghavarao can be extended by using near resolvable designs.
π SIMILAR VOLUMES
In this paper, we present new constructions for resolvable and near resolvable (v, 3, 2)-BIBDs. These constructions use balanced tournament designs and odd balanced tournament designs. We then use balanced tournament designs with almost orthogonal resolutions and odd balanced tournament designs with
## Abstract In a (__v, k__, Ξ»: __w__) incomplete block design (IBD) (or PBD [__v, {k, w__^\*^}. Ξ»]), the relation __v__ β₯ (__k__ β 1)__w__ + 1 must hold. In the case of equality, the IBD is referred to as a block design with a large hole, and the existence of such a configuration is equivalent to t
A near resolvable design, NRB(v, k), is a balanced incomplete block design whose block set can be partitioned into v classes such that each class contains every point of the design but one, and each point is missing from exactly one class. The necessary conditions for the existence of near resolvabl
Let V be a set of u elements. A (1,2; 3,v, I)-frame F is a square array of side v which satisfies the following properties. We index the rows and columns of F with the elements of V, V= {x Ir x2,, ,x,}. (1) Each cell is either empty or contains a 3-subset of V. (2) Cell (xi. xi) is empty for i= 1,2
The existence of doubly near resolvable (v, 2,1)-BZBDs was established by Mullin and Wallis in 1975. In this article, we determine the spectrum of a second class of doubly near resolvable balanced incomplete block designs. We prove the existence of DNR(v,3,2)-BZBDs for v = 1 (mod 3), v 2 10 and v @