Periodic Solutions of Second Order Nonlinear Difference Equations with Singular ϕ-Laplacian Operator by Ruyun Ma, Yanqiong Lu

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Global Bifurcation of Positive Solutions of Asymptotically Linear Elliptic Problems by Ruyun Ma, Yanqiong Lu, Ruipeng Chen

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Method of Lower and Upper Solutions for Elliptic Systems with Nonlinear Boundary Condition and Its Applications by Ruyun Ma, Ruipeng Chen, Yanqiong Lu

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Spectrum of Discrete Second-Order Neumann Boundary Value Problems with Sign-Changing Weight by Ruyun Ma, Chenghua Gao, Yanqiong Lu

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