Mathematical model for diamond-type crystals with impurities or defects.
Mechanical Lagrangian systems with external forces.
Models for quadratic algebras associated with second order superintegrable systems in 2D.
Multibump solutions for a class of lagrangian systems slowly oscillating at infinity
Multiple closed orbits for singular conservative systems via geodesic theory
Multiple homoclinic orbits for a class of conservative systems
Multiple orbits for hamiltonian systems on starshaped surfaces with symmetries
Multiple solutions for a class of -Laplacian systems.
Multiplicity of Subharmonic solutions of Forces Hamiltonian systems near an equilibrium.