For a graph G we consider the problem of the existence of a switching equivalent signed graph with Laplacian eigenvalues that are all main and the problem of determination of all switching equivale...

中文翻译：

---

所有拉普拉斯特征值都是主特征的有符号图

对于图 G，我们考虑以拉普拉斯特征值为主的切换等价符号图的存在性问题以及所有切换等价的确定问题...