Symmetric Design Residual Design Automorphism Group of a Design Self-Dual Code
Institute of Mathematics and Informatics Bulgarian Academy of Sciences
Serdica Mathematical Journal, Vol. 24, No 2, (1998), 179p-186p
In this note we construct five new symmetric 2-(61,16,4) designs
invariant under the dihedral group of order 10. As a by-product we
obtain 25 new residual 2-(45,12,4) designs. The automorphism groups of all
new designs are computed.
∗ This work has been partially supported by the Bulgarian NSF under Contract No. I-506/1995.