Yi Wang

collaborators

3 papers

math.CO2026

Extremal graphs for a conjecture on the square energy of graphs

Fu-Tao Hu, Ya-Yang Liu, Yi Wang

For a graph $G$ , let $s^{+} (G)$ and $s^{-} (G)$ denote the sums of the squares of its positive and negative adjacency eigenvalues. We determine all equality cases in the conjecture of E…

math.DS2026

Differential positivity and dynamical order in noisy oscillators under unidirectional coupling

Bochun Chang, Xiaofang Lin, Yi Wang

We focus on a stochastic system that models a collection of $N$ identical oscillators with unidirectional coupling, perturbed by white noise. The unidirectional coupling breaks the…

math.CO2026

Changes in the Seidel energy of blow-up graphs under edge deletion

Yayang Liu, Yi Wang

Let $S (G)$ denote the Seidel matrix of a simple graph $G$ , and let $E_{S} (G)$ be the Seidel energy of $G$ , defined as the sum of the absolute values of the eigenvalues of $S (G)$ . In…