A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2022; you can also visit the original URL.
The file type is application/pdf.
In search of 4-(12, 6, 4) designs: Part III
1993
The Australasian Journal of Combinatorics
Preserved Fulltext
A 4- (12, 6, 4) design that is not also a 5-(12, 6, 1) design must have at least one pair of blocks with five points in common. It is shown that there are just nine non-isomorphic such designs; so, including the 5-(12, 6, 1) design, there are ten 4-(12, 6, 4) designs. These designs are characterised by the orders of their automorphism groups and they all contain a 4-(11, 5, 1) design.
dblp:journals/ajc/BreachS93
fatcat:t5nhq25wqbcuxc7sjptd22ki5i