More Frames with Block Size Four

C.J. Colbourn 1, D.R. Stinson2, L. Zhu3
1 Department of Combinatorics and Optimization University of Waterloo Waterloo, Ontario, Canada N2L 3Gi
2 Department of Computer Science and Engineering University of Nebraska Lincoln, NE 68588-0115, U.S.A.
3 Department of Mathematics Suzhou University Suzhou, 215006, China

Abstract

We present a new construction to obtain frames with block size four using certain skew Room frames. The existence results of Rees and Stinson for frames with block size four are improved, especially nfor hole sizes divisible by \(6\). As a by-product of the skew Room
frames we construct, we are also able to show that a resolvable \((K_4 – e)\)-design with \(60t + 16\) points exists if \(t \geq 0\) and \(t \neq 8, 12\).