Several criteria for judging H- and non-H-matrices. - JianZhou Liu; Lei Wang 069; Zhenhua Lyu (Int. J. Comput. Math., 2016)

A Turán problem on digraphs avoiding distinct walks of a given length with the same endpoints. - Zejun Huang; Zhenhua Lyu; Pu Qiao (Discret. Math., 2019)

Extremal digraphs avoiding an orientation of C4. - Zejun Huang; Zhenhua Lyu (Discret. Math., 2020)

Extremal Digraphs Avoiding an Orientation of the Diamond. - Zhenhua Lyu (Graphs Comb., 2021)

Digraphs that contain at most t distinct walks of a given length with the same endpoints. - Zhenhua Lyu (J. Comb. Optim., 2021)

Extremal digraphs avoiding distinct walks of length 3 with the same endpoints. - Zejun Huang; Zhenhua Lyu (Discret. Math., 2022)

Extremal digraphs avoiding distinct walks of length 4 with the same endpoints. - Zhenhua Lyu (Discuss. Math. Graph Theory, 2022)

A Note on Extremal Digraphs Containing at Most t Walks of Length k with the Same Endpoints. - Zhenhua Lyu (Graphs Comb., 2022)

The γ-diagonally dominant degree of Schur complements and its applications. - Zhenhua Lyu; Lixin Zhou; Junye Ma (Comput. Appl. Math., 2024)

Estimations for determinants of strictly γ-diagonally dominant matrices. - Zhenhua Lyu (J. Appl. Math. Comput., 2025)