Open AccessGroup Divisible Designs with Two Associate Classes and
Author(s) -
Nittiya Pabhapote,
Narong Punnim
Publication year - 2011
Publication title -
international journal of mathematics and mathematical sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 39
eISSN - 1687-0425
pISSN - 0161-1712
DOI - 10.1155/2011/148580
Subject(s) - mathematics , group (periodic table) , block (permutation group theory) , combinatorics , arithmetic , discrete mathematics , organic chemistry , chemistry
The original classiffcation of PBIBDs defined group divisible designs GDD(=1+2+⋯+,,,1,2) with 1≠0. In this paper, we prove that the necessaryconditions are suffcient for the existence of the group divisible designs with two groupsof unequal sizes and block size three with 2=1
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