Author/Authors :
We have proved that there exists at least 2091 mutually nonisomorphic symmetric (79، نويسنده , , 39، نويسنده , , 19)-designs. In particular، نويسنده , , 1896 of them admit an action of the nonabelian group of order 57، نويسنده , , and an additional 194 an action of the nonabelian group of order 39.، نويسنده ,
Keywords :
Hadamard design , Automorphism group , Tactical decomposition , Orbit structure
