论文标题
与nu $（n + 1，q^2）$，$ n \ ne 3 $ cosectral
Graphs cospectral with NU$(n + 1, q^2)$, $n \ne 3$
论文作者
论文摘要
令$ h（n，q^2）$是$ pg（n，q^2）$，$ n \ ge 2 $的非排级赫米尔式品种。令nu $（n+1，q^2）$为$ pg（n，q^2）\ setminus h（n，q^2）$的点的图形，如果连接$ p_1 $和$ p_2 $是$ p_1 $和$ p_2 $是$ p_1 $ content contents of $ p_1 $，$ p_1 $，$ p_2 $是相邻的。然后nu $（n + 1，q^2）$是一个强烈的常规图。在本文中，我们表明nu $（n + 1，q^2）$，$ n \ ne 3 $不取决于其频谱。
Let $H(n, q^2)$ be a non-degenerate Hermitian variety of $PG(n, q^2)$, $n \ge 2$. Let NU$(n+1, q^2)$ be the graph whose vertices are the points of $PG(n, q^2) \setminus H(n, q^2)$ and two vertices $P_1$, $P_2$ are adjacent if the line joining $P_1$ and $P_2$ is tangent to $H(n, q^2)$. Then NU$(n + 1, q^2)$ is a strongly regular graph. In this paper we show that NU$(n + 1, q^2)$, $n \ne 3$, is not determined by its spectrum.
