Let $0=a_{0}<a_1\leq a_2\leq\cdots\leq a_{N-1}\leq 2$ be a sequence of $N$ real numbers lying in $[0,2]$. Is it true that there exists a connected, finite, simple and undirected graph $G$ with $N$ vertices such that $a_i=\lambda_i$ for $i=0,\ldots, N-1$, where $\lambda_0<\lambda_1\leq \lambda_2\leq\cdots \leq \lambda_{N-1}$ is the spectrum of the normalized graph Laplacian of $G$ ?
2026-03-25 09:48:40.1774432120
On the eigenvalue of the normalized graph Laplacian
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