GDDs with two associate classes and with one group of size 1 and m groups of size n and λ_1=5,λ_2=1
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Abstract
A group divisible design is an ordered pair
where
is an
set of symbols and
is a collection of
subsets (called blocks) of
satisfying the following properties: the
set is divided into
group of size
and
groups of size
; each pair of symbols from the same group occurs in exactly
blocks in
; and each pair of symbols from different groups occurs in exactly
blocks in
. In this paper, we find necessary and sufficient conditions for the existence of a group divisible design group divisible design
, where
.
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References
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