ULLAH, WAHID
ULLAH, WAHID
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A multiplicity result for Hamiltonian systems with mixed periodic-type and Neumann-type boundary conditions
2025-01-01 Ullah, Wahid
An Extension of the Poincaré–Birkhoff Theorem to Systems Having Singular Nonlinearities
2026-01-01 Mamo, N. G.; Sfecci, A.; Ullah, W.
Antiperiodic Solutions for Nonlinear Asymmetric Equations Near Resonance
2025-01-01 Fonda, Alessandro; Mamo, Natnael Gezahegn; Sfecci, Andrea; Ullah, Wahid
Applying the Poincaré-Birkhoff theorem to antiperiodic problems
2026-01-01 Fonda, Alessandro; Mamo, Natnael Gezahegn; Sfecci, Andrea; Ullah, Wahid
Boundary value problems associated with Hamiltonian systems coupled with positively-(p, q)-homogeneous systems
2024-01-01 Fonda, Alessandro; Ullah, Wahid
Existence and multiplicity of solutions for boundary value problems associated with Hamiltonian systems
2025-09-02 Ullah, Wahid
Landesman–Lazer-Type Conditions for Systems Involving Twist and Positively Homogeneous Hamiltonian Systems
2025-01-01 Mamo, N. G.; Ullah, W.
Periodic solutions of Hamiltonian systems coupling twist with an isochronous center
2024-01-01 Fonda, Alessandro; Ullah, Wahid
Periodic solutions of Hamiltonian systems coupling twist with generalized lower/upper solutions
2024-01-01 Fonda, Alessandro; Ullah, Wahid
Perturbed positively-(p, q)-homogeneous Hamiltonian systems with Frederickson–Lazer conditions
2025-01-01 Fonda, A.; Mamo, N. G.; Sfecci, A.; Ullah, W.