On the strongly regular graphs obtained from quasi-symmetric 2-(31,7,7) designs
摘要
It is known that the five non-isomorphic quasi-symmetric 2-(31, 7, 7) designs lead to non-isomorphic strongly regular graphs with parameters (155, 42, 17, 9). We will show that there exist no isomorphisms among these graphs and the block graphs of the Steiner triple systems STS(31) except the isomorphism between the block graphs of the point-plane design and the point-line design of PG(4, 2).
引用本文（GB/T 7714）
Naoyuki Horiguchi, Hiroyuki Nakasora, Takehisa Wakabayashi. On the strongly regular graphs obtained from quasi-symmetric 2-(31,7,7) designs[J]. Institutional Repositories DataBase (IRDB), 2005.
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