Edit Profile (opens in new tab) Fonda, Alessandro Compute Distance To: Compute Author ID: fonda.alessandro Published as: Fonda, Alessandro; Fonda, A. External Links: MGP · ORCID Documents Indexed: 96 Publications since 1986, including 2 Books 4 Contributions as Editor Reviewing Activity: 177 Reviews Co-Authors: 33 Co-Authors with 86 Joint Publications 658 Co-Co-Authors all top 5 Co-Authors 14 single-authored 12 Toader, Rodica 10 Fabry, Christian 10 Sfecci, Andrea 10 Zanolin, Fabio 7 Garrione, Maurizio 7 Mawhin, Jean L. 5 Gidoni, Paolo 4 Klun, Giuliano 4 Ureña, Antonio J. 3 Cañada Villar, Antonio 3 Colombo, Giovanni 3 Drábek, Pavel 3 Gossez, Jean-Pierre 3 Willem, Michel 2 Boscaggin, Alberto 2 Cellina, Arrigo 2 Gallo, Anna Chiara 2 Ghirardelli, Luca 2 Munyamarere, François 2 Ortega, Rafael 2 Ramos, Miguel 2 Schneider, Zdenek 2 Torres, Pedro José 1 Buttazzoni, Paola 1 Habets, Patrick 1 Lazer, Alan C. 1 Lupo, Daniela 1 Manasevich, Raul F. 1 Mezzetti, Emilia 1 Omari, Pierpaolo 1 Ornelas, António 1 Sabatini, Marco 1 Schmitt, Klaus all top 5 Serials 14 Journal of Differential Equations 7 Nonlinear Analysis. Theory, Methods & Applications. Series A: Theory and Methods 7 Topological Methods in Nonlinear Analysis 7 Discrete and Continuous Dynamical Systems 6 Proceedings of the American Mathematical Society 6 Advanced Nonlinear Studies 4 Annali di Matematica Pura ed Applicata. Serie Quarta 4 Differential and Integral Equations 3 Proceedings of the Royal Society of Edinburgh. Section A. Mathematics 3 Handbook of Differential Equations 2 Annales de l’Institut Henri Poincaré. Analyse Non Linéaire 2 Celestial Mechanics and Dynamical Astronomy 2 NoDEA. Nonlinear Differential Equations and Applications 2 Rapport. Séminaire de Mathématique. Nouvelle Série 2 Advances in Nonlinear Analysis 2 Nonlinear Analysis. Theory, Methods & Applications 1 Israel Journal of Mathematics 1 Journal of Mathematical Analysis and Applications 1 Mathematics Magazine 1 Archiv der Mathematik 1 Bulletin of the London Mathematical Society 1 Commentationes Mathematicae Universitatis Carolinae 1 Journal of Computational and Applied Mathematics 1 Rendiconti dell’Istituto di Matematica dell’Università di Trieste 1 Bulletin de la Classe des Sciences. 5e Série 1 Journal de Mathématiques Pures et Appliquées. Neuvième Série 1 SIAM Journal on Mathematical Analysis 1 Bollettino della Unione Matemàtica Italiana. Serie VII. A 1 Mémoire de la Classe des Sciences. Collection Octavo. 3e Série 1 Advances in Differential Equations 1 Portugaliae Mathematica. Nova Série 1 Comptes Rendus. Mathématique. Académie des Sciences, Paris 1 Annali della Scuola Normale Superiore di Pisa. Classe di Scienze. Serie V 1 Mediterranean Journal of Mathematics 1 Ars Mathematica Contemporanea 1 Pure and Applied Functional Analysis 1 Compact Textbooks in Mathematics 1 Birkhäuser Advanced Texts. Basler Lehrbücher all top 5 Fields 76 Ordinary differential equations (34-XX) 29 Dynamical systems and ergodic theory (37-XX) 26 Operator theory (47-XX) 9 Partial differential equations (35-XX) 8 Mechanics of particles and systems (70-XX) 5 Global analysis, analysis on manifolds (58-XX) 4 General and overarching topics; collections (00-XX) 4 Calculus of variations and optimal control; optimization (49-XX) 3 General topology (54-XX) 2 Measure and integration (28-XX) 2 Geometry (51-XX) 2 Numerical analysis (65-XX) 2 Biology and other natural sciences (92-XX) 1 History and biography (01-XX) 1 Real functions (26-XX) 1 Algebraic topology (55-XX) 1 Mechanics of deformable solids (74-XX) Publications by Year all cited Publications top 5 cited Publications Citations contained in zbMATH Open 86 Publications have been cited 942 times in 520 Documents Cited by ▼ Year ▼ Subharmonic solutions for some second-order differential equations with singularities. Zbl 0787.34035Fonda, Alessandro; Manásevich, Raúl; Zanolin, Fabio 87 1993 Uniformly persistent semidynamical systems. Zbl 0667.34065Fonda, Alessandro 48 1988 Periodic orbits of radially symmetric Keplerian-like systems: a topological degree approach. Zbl 1168.34031Fonda, Alessandro; Toader, Rodica 37 2008 Nonlinear resonance in asymmetric oscillators. Zbl 0915.34033Fabry, Christian; Fonda, Alessandro 32 1998 Periodic solutions of asymptotically positively homogeneous differential equations. Zbl 0692.34041Fonda, Alessandro; Habets, Patrick 31 1989 Periodic solutions of perturbed Hamiltonian systems in the plane by the use of the Poincaré-Birkhoff theorem. Zbl 1277.34046Fonda, Alessandro; Sabatini, Marco; Zanolin, Fabio 27 2012 A higher dimensional Poincaré-Birkhoff theorem for Hamiltonian flows. Zbl 1442.37076Fonda, Alessandro; Ureña, Antonio J. 26 2017 Subharmonic solutions of conservative systems with nonconvex potentials. Zbl 0752.34027Fonda, A.; Lazer, A. C. 25 1992 Periodic solutions of radially symmetric perturbations of Newtonian systems. Zbl 1248.34051Fonda, Alessandro; Toader, Rodica 22 2012 Periodic solutions of weakly coupled superlinear systems. Zbl 1351.34046Fonda, Alessandro; Sfecci, Andrea 22 2016 On the use of time-maps for the solvability of nonlinear boundary value problems. Zbl 0766.34012Fonda, Alessandro; Zanolin, Fabio 21 1992 Radially symmetric systems with a singularity and asymptotically linear growth. Zbl 1218.34047Fonda, Alessandro; Toader, Rodica 19 2011 Periodic oscillations for a nonlinear suspension bridge model. Zbl 0810.73030Fonda, Alessandro; Schneider, Zdenek; Zanolin, Fabio 19 1994 Periodic solutions of nonlinear differential equations with double resonance. Zbl 0729.34025Fabry, C.; Fonda, A. 19 1990 Guiding functions and periodic solutions to functional differential equations. Zbl 0616.34038Fonda, Alessandro 18 1987 Subharmonic oscillations of forced pendulum-type equations. Zbl 0708.34028Fonda, A.; Willem, M. 18 1989 Periodic, subharmonic, and quasi-periodic oscillations under the action of a central force. Zbl 1231.34073Fonda, Alessandro; Ureña, Antonio J. 18 2011 Large-amplitude subharmonic oscillations for scalar second-order differential equations with asymmetric nonlinearities. Zbl 0798.34048Fonda, A.; Ramos, M. 18 1994 Positively homogeneous Hamiltonian systems in the plane. Zbl 1068.34035Fonda, Alessandro 18 2004 Periodic perturbations of Hamiltonian systems. Zbl 1353.37124Fonda, Alessandro; Garrione, Maurizio; Gidoni, Paolo 18 2016 A general method for the existence of periodic solutions of differential systems in the plane. Zbl 1237.34079Fonda, Alessandro; Sfecci, Andrea 16 2012 Quadratic forms, weighted eigenfunctions and boundary value problems for nonlinear second order ordinary differential equations. Zbl 0677.34022Fonda, Alessandro; Mawhin, Jean 15 1989 Periodic orbits of radially symmetric systems with a singularity: the repulsive case. Zbl 1241.34048Fonda, Alessandro; Toader, Rodica 15 2011 Periodic solutions of singular radially symmetric systems with superlinear growth. Zbl 1251.34056Fonda, Alessandro; Toader, Rodica; Zanolin, Fabio 15 2012 Subharmonic solutions for second order differential equations. Zbl 0803.34029Fonda, A.; Ramos, M.; Willem, M. 14 1993 Double resonance with Landesman-Lazer conditions for planar systems of ordinary differential equations. Zbl 1227.34037Fonda, Alessandro; Garrione, Maurizio 13 2011 Subharmonic solutions of Hamiltonian systems displaying some kind of sublinear growth. Zbl 1419.37059Fonda, Alessandro; Toader, Rodica 12 2019 Iterative and variational methods for the solvability of some semilinear equations in Hilbert spaces. Zbl 0761.34047Fonda, Alessandro; Mawhin, Jean 11 1992 On a singular periodic Ambrosetti-Prodi problem. Zbl 1385.34030Fonda, Alessandro; Sfecci, Andrea 11 2017 Periodic solutions of a system of coupled oscillators with one-sided superlinear retraction forces. Zbl 1274.34125Fonda, Alessandro; Sfecci, Andrea 11 2012 Periodic solutions for a conservative system of differential equations with a singularity of repulsive type. Zbl 0830.34033Fonda, Alessandro 10 1995 Periodic solutions of perturbed isochronous Hamiltonian systems at resonance. Zbl 1080.34020Fabry, Christian; Fonda, Alessandro 10 2005 Planar differential systems at resonance. Zbl 1155.34020Fonda, Alessandro; Mawhin, Jean 10 2006 Periodic solutions of pendulum-like Hamiltonian systems in the plane. Zbl 1264.34078Fonda, Alessandro; Toader, Rodica 10 2012 A Landesman-Lazer type condition for asymptotically linear second-order equations with a singularity. Zbl 1400.34063Fonda, Alessandro; Garrione, Maurizio 10 2012 On the existence of periodic solutions for scalar second order differential equations when only the asymptotic behaviour of the potential is known. Zbl 0782.34047Fonda, Alessandro 9 1993 Unbounded motions of perturbed isochronous Hamiltonian systems at resonance. Zbl 1088.34027Fabry, Christian; Fonda, Alessandro 9 2005 Nonlinear resonance: a comparison between Landesman-Lazer and Ahmad-Lazer-Paul conditions. Zbl 1222.34024Fonda, Alessandro; Garrione, Maurizio 9 2011 Periodic solutions of scalar second order differential equations with a singularity. Zbl 1221.34110Fonda, Alessandro 9 1993 Lower semicontinuous perturbations of maximal monotone differential inclusions. Zbl 0661.47038Colombo, Giovanni; Fonda, Alessandro; Ornelas, António 9 1988 Multiple periodic solutions of conservative systems with periodic nonlinearity. Zbl 0718.34054Fonda, A.; Mawhin, J. 9 1989 Handbook of differential equations: Ordinary differential equations. Vol. III. Zbl 1107.34002 9 2006 Generalizing the Poincaré-Miranda theorem: the avoiding cones condition. Zbl 1386.55004Fonda, Alessandro; Gidoni, Paolo 9 2016 Playing around resonance. An invitation to the search of periodic solutions for second order ordinary differential equations. Zbl 1364.34004Fonda, Alessandro 8 2016 Multiple periodic solutions of Hamiltonian systems in the plane. Zbl 1221.34111Fonda, Alessandro; Ghirardelli, Luca 6 2010 Multiple periodic solutions of scalar second order differential equations. Zbl 1245.34049Fonda, Alessandro; Ghirardelli, Luca 6 2010 A higher-dimensional Poincaré-Birkhoff theorem without monotone twist. (Un théorème de Poincaré-Birkhoff en plusieurs dimensions sans torsion monotone.) Zbl 1382.37054Fonda, Alessandro; Ureña, Antonio J. 6 2016 Semicoercive variational problems at resonance: An abstract approach. Zbl 0727.35056Fonda, A.; Gossez, J.-P. 6 1990 Multiple periodic solutions of Hamiltonian systems confined in a box. Zbl 1373.37147Fonda, Alessandro; Sfecci, Andrea 6 2017 Radial periodic perturbations of the Kepler problem. Zbl 1375.34067Fonda, Alessandro; Gallo, Anna Chiara 6 2017 Periodic motions in a gravitational central field with a rotating external force. Zbl 1266.34070Fonda, Alessandro; Toader, Rodica; Torres, Pedro J. 6 2012 An avoiding cones condition for the Poincaré-Birkhoff theorem. Zbl 1369.37064Fonda, Alessandro; Gidoni, Paolo 6 2017 Periodic solutions to second order differential equations of Liénard type with jumping nonlinearities. Zbl 0625.34046Fonda, Alessandro; Zanolin, Fabio 5 1987 Periodic bouncing solutions for nonlinear impact oscillators. Zbl 1278.34039Fonda, Alessandro; Sfecci, Andrea 5 2013 On a nonresonance condition for a semilinear elliptic problem. Zbl 0735.35054Fonda, Alessandro; Gossez, Jean-Pierre; Zanolin, Fabio 4 1991 Nonlinear equations at resonance and generalized eigenvalue problems. Zbl 0756.34079Fabry, C.; Fonda, A. 4 1992 An iterative method for the solvability of semilinear equations in Hilbert spaces and applications. Zbl 0813.47077Fonda, A.; Mawhin, J. 4 1992 Periodic oscillations of forced pendulums with very small length. Zbl 0865.34033Fonda, Alessandro; Zanolin, Fabio 4 1997 Periodic perturbations of scalar second order differential equations. Zbl 0951.34024Buttazzoni, Paola; Fonda, Alessandro 4 1997 Bounded solutions of nonlinear second order ordinary differential equations. Zbl 0954.34027Fonda, Alessandro; Zanolin, Fabio 4 1998 Periodic perturbations with rotational symmetry of planar systems driven by a central force. Zbl 1392.34045Fonda, Alessandro; Gallo, Anna Chiara 4 2018 A continuous version of Liapunov’s convexity theorem. Zbl 0647.28002Cellina, Arrigo; Colombo, Giovanni; Fonda, Alessandro 3 1988 Handbook of differential equations: Ordinary differential equations. Vol. II. Zbl 1074.34003 3 2005 Semilinear equations at resonance with non-symmetric linear part. Zbl 0859.47041Fabry, C.; Fonda, A.; Munyamarere, F. 3 1993 Handbook of differential equations: Ordinary differential equations. Vol. I. Zbl 1067.34001 3 2004 Positively homogeneous equations in the plane. Zbl 1079.34011Fonda, Alessandro; Ortega, Rafael 3 2000 A Poincaré-Birkhoff theorem for Hamiltonian flows on nonconvex domains. Zbl 1423.37056Fonda, Alessandro; Ureña, Antonio J. 3 2019 Bifurcations from infinity in asymmetric nonlinear oscillators. Zbl 0979.34033Fabry, Christian; Fonda, Alessandro 3 2000 An infinite-dimensional version of the Poincaré-Birkhoff theorem on the Hilbert cube. Zbl 07328847Boscaggin, Alberto; Fonda, Alessandro; Garrione, Maurizio 3 2020 Approximate selections and fixed points for upper semicontinuous maps with decomposable values. Zbl 0606.54018Cellina, Arrigo; Colombo, Giovanni; Fonda, Alessandro 2 1986 Topological degree and generalized asymmetric oscillators. Zbl 1105.37036Fonda, Alessandro 2 2006 A multiplicity result for periodic solutions of second-order differential equations with a singularity. Zbl 1278.34038Boscaggin, Alberto; Fonda, Alessandro; Garrione, Maurizio 2 2012 Lower and upper solutions to semilinear boundary value problems: an abstract approach. Zbl 1243.35030Fonda, Alessandro; Toader, Rodica 2 2011 Periodic solutions of nearly integrable Hamiltonian systems bifurcating from infinite-dimensional tori. Zbl 1451.37092Fonda, Alessandro; Klun, Giuliano; Sfecci, Andrea 2 2020 Coupling linearity and twist: an extension of the Poincaré-Birkhoff theorem for Hamiltonian systems. Zbl 1454.37057Fonda, Alessandro; Gidoni, Paolo 2 2020 Multiple periodic solutions of infinite-dimensional pendulum-like equations. Zbl 1457.34066Fonda, Alessandro; Mawhin, Jean; Willem, Michel 2 2020 Well-ordered and non-well-ordered lower and upper solutions for periodic planar systems. Zbl 1471.34074Fonda, Alessandro; Klun, Giuliano; Sfecci, Andrea 2 2021 Periodic solutions of second-order differential equations in Hilbert spaces. Zbl 1482.34110Fonda, Alessandro; Klun, Giuliano; Sfecci, Andrea 2 2021 Periodic oscillations for a suspension bridge model. (Abstract). Zbl 0850.34019Fonda, A.; Schneider, Z.; Zanolin, F. 1 1992 Periodic solutions of second order ordinary differential equations. Zbl 0706.34038Fonda, Alessandro; Lupo, Daniela 1 1989 Asymmetric nonlinear oscillators. Zbl 0993.34037Fabry, Christian; Fonda, Alessandro 1 2001 A permanence theorem for local dynamical systems. Zbl 1373.37082Fonda, Alessandro; Gidoni, Paolo 1 2015 A generalization of the parallelogram law to higher dimensions. Zbl 1423.51009Fonda, Alessandro 1 2019 On the topological degree of planar maps avoiding normal cones. Zbl 07130721Fonda, Alessandro; Klun, Giuliano 1 2019 Generalized Sturm Liouville boundary conditions for first order differential systems in the plane. Zbl 1312.34054Fonda, Alessandro; Garrione, Maurizio 1 2013 A dynamical approach to lower and upper solutions for planar systems. “To the memory of Massimo Tarallo”. Zbl 1478.34043Fonda, Alessandro; Toader, Rodica 1 2021 Well-ordered and non-well-ordered lower and upper solutions for periodic planar systems. Zbl 1471.34074Fonda, Alessandro; Klun, Giuliano; Sfecci, Andrea 2 2021 Periodic solutions of second-order differential equations in Hilbert spaces. Zbl 1482.34110Fonda, Alessandro; Klun, Giuliano; Sfecci, Andrea 2 2021 A dynamical approach to lower and upper solutions for planar systems. “To the memory of Massimo Tarallo”. Zbl 1478.34043Fonda, Alessandro; Toader, Rodica 1 2021 An infinite-dimensional version of the Poincaré-Birkhoff theorem on the Hilbert cube. Zbl 07328847Boscaggin, Alberto; Fonda, Alessandro; Garrione, Maurizio 3 2020 Periodic solutions of nearly integrable Hamiltonian systems bifurcating from infinite-dimensional tori. Zbl 1451.37092Fonda, Alessandro; Klun, Giuliano; Sfecci, Andrea 2 2020 Coupling linearity and twist: an extension of the Poincaré-Birkhoff theorem for Hamiltonian systems. Zbl 1454.37057Fonda, Alessandro; Gidoni, Paolo 2 2020 Multiple periodic solutions of infinite-dimensional pendulum-like equations. Zbl 1457.34066Fonda, Alessandro; Mawhin, Jean; Willem, Michel 2 2020 Subharmonic solutions of Hamiltonian systems displaying some kind of sublinear growth. Zbl 1419.37059Fonda, Alessandro; Toader, Rodica 12 2019 A Poincaré-Birkhoff theorem for Hamiltonian flows on nonconvex domains. Zbl 1423.37056Fonda, Alessandro; Ureña, Antonio J. 3 2019 A generalization of the parallelogram law to higher dimensions. Zbl 1423.51009Fonda, Alessandro 1 2019 On the topological degree of planar maps avoiding normal cones. Zbl 07130721Fonda, Alessandro; Klun, Giuliano 1 2019 Periodic perturbations with rotational symmetry of planar systems driven by a central force. Zbl 1392.34045Fonda, Alessandro; Gallo, Anna Chiara 4 2018 A higher dimensional Poincaré-Birkhoff theorem for Hamiltonian flows. Zbl 1442.37076Fonda, Alessandro; Ureña, Antonio J. 26 2017 On a singular periodic Ambrosetti-Prodi problem. Zbl 1385.34030Fonda, Alessandro; Sfecci, Andrea 11 2017 Multiple periodic solutions of Hamiltonian systems confined in a box. Zbl 1373.37147Fonda, Alessandro; Sfecci, Andrea 6 2017 Radial periodic perturbations of the Kepler problem. Zbl 1375.34067Fonda, Alessandro; Gallo, Anna Chiara 6 2017 An avoiding cones condition for the Poincaré-Birkhoff theorem. Zbl 1369.37064Fonda, Alessandro; Gidoni, Paolo 6 2017 Periodic solutions of weakly coupled superlinear systems. Zbl 1351.34046Fonda, Alessandro; Sfecci, Andrea 22 2016 Periodic perturbations of Hamiltonian systems. Zbl 1353.37124Fonda, Alessandro; Garrione, Maurizio; Gidoni, Paolo 18 2016 Generalizing the Poincaré-Miranda theorem: the avoiding cones condition. Zbl 1386.55004Fonda, Alessandro; Gidoni, Paolo 9 2016 Playing around resonance. An invitation to the search of periodic solutions for second order ordinary differential equations. Zbl 1364.34004Fonda, Alessandro 8 2016 A higher-dimensional Poincaré-Birkhoff theorem without monotone twist. (Un théorème de Poincaré-Birkhoff en plusieurs dimensions sans torsion monotone.) Zbl 1382.37054Fonda, Alessandro; Ureña, Antonio J. 6 2016 A permanence theorem for local dynamical systems. Zbl 1373.37082Fonda, Alessandro; Gidoni, Paolo 1 2015 Periodic bouncing solutions for nonlinear impact oscillators. Zbl 1278.34039Fonda, Alessandro; Sfecci, Andrea 5 2013 Generalized Sturm Liouville boundary conditions for first order differential systems in the plane. Zbl 1312.34054Fonda, Alessandro; Garrione, Maurizio 1 2013 Periodic solutions of perturbed Hamiltonian systems in the plane by the use of the Poincaré-Birkhoff theorem. Zbl 1277.34046Fonda, Alessandro; Sabatini, Marco; Zanolin, Fabio 27 2012 Periodic solutions of radially symmetric perturbations of Newtonian systems. Zbl 1248.34051Fonda, Alessandro; Toader, Rodica 22 2012 A general method for the existence of periodic solutions of differential systems in the plane. Zbl 1237.34079Fonda, Alessandro; Sfecci, Andrea 16 2012 Periodic solutions of singular radially symmetric systems with superlinear growth. Zbl 1251.34056Fonda, Alessandro; Toader, Rodica; Zanolin, Fabio 15 2012 Periodic solutions of a system of coupled oscillators with one-sided superlinear retraction forces. Zbl 1274.34125Fonda, Alessandro; Sfecci, Andrea 11 2012 Periodic solutions of pendulum-like Hamiltonian systems in the plane. Zbl 1264.34078Fonda, Alessandro; Toader, Rodica 10 2012 A Landesman-Lazer type condition for asymptotically linear second-order equations with a singularity. Zbl 1400.34063Fonda, Alessandro; Garrione, Maurizio 10 2012 Periodic motions in a gravitational central field with a rotating external force. Zbl 1266.34070Fonda, Alessandro; Toader, Rodica; Torres, Pedro J. 6 2012 A multiplicity result for periodic solutions of second-order differential equations with a singularity. Zbl 1278.34038Boscaggin, Alberto; Fonda, Alessandro; Garrione, Maurizio 2 2012 Radially symmetric systems with a singularity and asymptotically linear growth. Zbl 1218.34047Fonda, Alessandro; Toader, Rodica 19 2011 Periodic, subharmonic, and quasi-periodic oscillations under the action of a central force. Zbl 1231.34073Fonda, Alessandro; Ureña, Antonio J. 18 2011 Periodic orbits of radially symmetric systems with a singularity: the repulsive case. Zbl 1241.34048Fonda, Alessandro; Toader, Rodica 15 2011 Double resonance with Landesman-Lazer conditions for planar systems of ordinary differential equations. Zbl 1227.34037Fonda, Alessandro; Garrione, Maurizio 13 2011 Nonlinear resonance: a comparison between Landesman-Lazer and Ahmad-Lazer-Paul conditions. Zbl 1222.34024Fonda, Alessandro; Garrione, Maurizio 9 2011 Lower and upper solutions to semilinear boundary value problems: an abstract approach. Zbl 1243.35030Fonda, Alessandro; Toader, Rodica 2 2011 Multiple periodic solutions of Hamiltonian systems in the plane. Zbl 1221.34111Fonda, Alessandro; Ghirardelli, Luca 6 2010 Multiple periodic solutions of scalar second order differential equations. Zbl 1245.34049Fonda, Alessandro; Ghirardelli, Luca 6 2010 Periodic orbits of radially symmetric Keplerian-like systems: a topological degree approach. Zbl 1168.34031Fonda, Alessandro; Toader, Rodica 37 2008 Planar differential systems at resonance. Zbl 1155.34020Fonda, Alessandro; Mawhin, Jean 10 2006 Handbook of differential equations: Ordinary differential equations. Vol. III. Zbl 1107.34002 9 2006 Topological degree and generalized asymmetric oscillators. Zbl 1105.37036Fonda, Alessandro 2 2006 Periodic solutions of perturbed isochronous Hamiltonian systems at resonance. Zbl 1080.34020Fabry, Christian; Fonda, Alessandro 10 2005 Unbounded motions of perturbed isochronous Hamiltonian systems at resonance. Zbl 1088.34027Fabry, Christian; Fonda, Alessandro 9 2005 Handbook of differential equations: Ordinary differential equations. Vol. II. Zbl 1074.34003 3 2005 Positively homogeneous Hamiltonian systems in the plane. Zbl 1068.34035Fonda, Alessandro 18 2004 Handbook of differential equations: Ordinary differential equations. Vol. I. Zbl 1067.34001 3 2004 Asymmetric nonlinear oscillators. Zbl 0993.34037Fabry, Christian; Fonda, Alessandro 1 2001 Positively homogeneous equations in the plane. Zbl 1079.34011Fonda, Alessandro; Ortega, Rafael 3 2000 Bifurcations from infinity in asymmetric nonlinear oscillators. Zbl 0979.34033Fabry, Christian; Fonda, Alessandro 3 2000 Nonlinear resonance in asymmetric oscillators. Zbl 0915.34033Fabry, Christian; Fonda, Alessandro 32 1998 Bounded solutions of nonlinear second order ordinary differential equations. Zbl 0954.34027Fonda, Alessandro; Zanolin, Fabio 4 1998 Periodic oscillations of forced pendulums with very small length. Zbl 0865.34033Fonda, Alessandro; Zanolin, Fabio 4 1997 Periodic perturbations of scalar second order differential equations. Zbl 0951.34024Buttazzoni, Paola; Fonda, Alessandro 4 1997 Periodic solutions for a conservative system of differential equations with a singularity of repulsive type. Zbl 0830.34033Fonda, Alessandro 10 1995 Periodic oscillations for a nonlinear suspension bridge model. Zbl 0810.73030Fonda, Alessandro; Schneider, Zdenek; Zanolin, Fabio 19 1994 Large-amplitude subharmonic oscillations for scalar second-order differential equations with asymmetric nonlinearities. Zbl 0798.34048Fonda, A.; Ramos, M. 18 1994 Subharmonic solutions for some second-order differential equations with singularities. Zbl 0787.34035Fonda, Alessandro; Manásevich, Raúl; Zanolin, Fabio 87 1993 Subharmonic solutions for second order differential equations. Zbl 0803.34029Fonda, A.; Ramos, M.; Willem, M. 14 1993 On the existence of periodic solutions for scalar second order differential equations when only the asymptotic behaviour of the potential is known. Zbl 0782.34047Fonda, Alessandro 9 1993 Periodic solutions of scalar second order differential equations with a singularity. Zbl 1221.34110Fonda, Alessandro 9 1993 Semilinear equations at resonance with non-symmetric linear part. Zbl 0859.47041Fabry, C.; Fonda, A.; Munyamarere, F. 3 1993 Subharmonic solutions of conservative systems with nonconvex potentials. Zbl 0752.34027Fonda, A.; Lazer, A. C. 25 1992 On the use of time-maps for the solvability of nonlinear boundary value problems. Zbl 0766.34012Fonda, Alessandro; Zanolin, Fabio 21 1992 Iterative and variational methods for the solvability of some semilinear equations in Hilbert spaces. Zbl 0761.34047Fonda, Alessandro; Mawhin, Jean 11 1992 Nonlinear equations at resonance and generalized eigenvalue problems. Zbl 0756.34079Fabry, C.; Fonda, A. 4 1992 An iterative method for the solvability of semilinear equations in Hilbert spaces and applications. Zbl 0813.47077Fonda, A.; Mawhin, J. 4 1992 Periodic oscillations for a suspension bridge model. (Abstract). Zbl 0850.34019Fonda, A.; Schneider, Z.; Zanolin, F. 1 1992 On a nonresonance condition for a semilinear elliptic problem. Zbl 0735.35054Fonda, Alessandro; Gossez, Jean-Pierre; Zanolin, Fabio 4 1991 Periodic solutions of nonlinear differential equations with double resonance. Zbl 0729.34025Fabry, C.; Fonda, A. 19 1990 Semicoercive variational problems at resonance: An abstract approach. Zbl 0727.35056Fonda, A.; Gossez, J.-P. 6 1990 Periodic solutions of asymptotically positively homogeneous differential equations. Zbl 0692.34041Fonda, Alessandro; Habets, Patrick 31 1989 Subharmonic oscillations of forced pendulum-type equations. Zbl 0708.34028Fonda, A.; Willem, M. 18 1989 Quadratic forms, weighted eigenfunctions and boundary value problems for nonlinear second order ordinary differential equations. Zbl 0677.34022Fonda, Alessandro; Mawhin, Jean 15 1989 Multiple periodic solutions of conservative systems with periodic nonlinearity. Zbl 0718.34054Fonda, A.; Mawhin, J. 9 1989 Periodic solutions of second order ordinary differential equations. Zbl 0706.34038Fonda, Alessandro; Lupo, Daniela 1 1989 Uniformly persistent semidynamical systems. Zbl 0667.34065Fonda, Alessandro 48 1988 Lower semicontinuous perturbations of maximal monotone differential inclusions. Zbl 0661.47038Colombo, Giovanni; Fonda, Alessandro; Ornelas, António 9 1988 A continuous version of Liapunov’s convexity theorem. Zbl 0647.28002Cellina, Arrigo; Colombo, Giovanni; Fonda, Alessandro 3 1988 Guiding functions and periodic solutions to functional differential equations. Zbl 0616.34038Fonda, Alessandro 18 1987 Periodic solutions to second order differential equations of Liénard type with jumping nonlinearities. Zbl 0625.34046Fonda, Alessandro; Zanolin, Fabio 5 1987 Approximate selections and fixed points for upper semicontinuous maps with decomposable values. Zbl 0606.54018Cellina, Arrigo; Colombo, Giovanni; Fonda, Alessandro 2 1986 all cited Publications top 5 cited Publications all top 5 Cited by 502 Authors 42 Fonda, Alessandro 32 Zanolin, Fabio 20 Cheng, Zhibo 17 Lu, Shiping 17 Wang, Zaihong 15 Qian, Dingbian 15 Sfecci, Andrea 14 Boscaggin, Alberto 14 Chu, Jifeng 12 Liang, Zaitao 12 Torres, Pedro José 11 Garrione, Maurizio 11 Mawhin, Jean L. 11 Zhang, Meirong 10 Kong, Fanchao 10 Xin, Yun 9 Kornev, Sergeĭ Viktorovich 9 Ma, Tiantian 9 Obukhovskiĭ, Valeriĭ Vladimirovich 9 Omari, Pierpaolo 9 Toader, Rodica 8 Li, Shengjun 8 Ortega, Rafael 8 Rebelo, Carlota 8 Yang, Xiaojing 7 Zhang, Ziheng 6 Fabry, Christian 6 Gidoni, Paolo 6 Li, Xiong 6 Liao, Fangfang 6 Malík, Josef 6 Margheri, Alessandro 6 O’Regan, Donal 6 Ren, Jingli 5 Feltrin, Guglielmo 5 Gossez, Jean-Pierre 5 Ma, Ruyun 5 Zamora, Manuel 4 Agarwal, Ravi P. 4 Amster, Pablo 4 Capietto, Anna 4 Dambrosio, Walter 4 Drábek, Pavel 4 Freedman, Herbert Irving 4 Ge, Weigao 4 Klun, Giuliano 4 Li, Yong 4 Liu, Bin 4 Luo, Zhiguo 4 Nguyen Van Loi 4 Papageorgiou, Nikolaos S. 4 Staicu, Vasile 4 Tang, Chun-Lei 4 Wang, Shuang 4 Yan, Ping 4 Yao, Shaowen 4 Yu, Xingchen 3 Bartsch, Thomas J. 3 Chen, Lijuan 3 Ding, Tongren 3 Ding, Wei 3 Dondè, Tobia 3 Fernandes, M. Lourdes C. 3 Gallo, Anna Chiara 3 Girejko, Ewa 3 Guo, Yuanzhi 3 Habets, Patrick 3 Jiang, Daqing 3 Jiang, Meiyue 3 Liu, Qihuai 3 López-Gómez, Julián 3 Mozyrska, Dorota 3 Muñoz-Hernández, Eduardo 3 Rachůnková, Irena 3 Tajčová, Gabriela 3 Tang, Xianhua 3 Timoumi, Mohsen 3 Wang, Zhi-Qiang 3 Wu, Yinyin 3 Wyrwas, Małgorzata 3 Yu, Jian-She 3 Zhang, Wen 2 Aizicovici, Sergiu 2 Bacaër, Nicolas 2 Berkovits, Juha 2 Burra, Lakshmi 2 Cai, Liming 2 Calamai, Alessandro 2 Carlota, Clara 2 Chá, Sílvia 2 Chen, Fanfan 2 Chen, Yongxue 2 Guedes de Figueiredo, Djairo 2 Dong, Yujun 2 Felmer, Patricio L. 2 Georgescu, Paul 2 Henrard, Marc 2 Hofbauer, Josef 2 Jiang, Qin 2 Lashari, Abid Ali ...and 402 more Authors all top 5 Cited in 131 Serials 49 Journal of Differential Equations 45 Journal of Mathematical Analysis and Applications 40 Nonlinear Analysis. Theory, Methods & Applications. Series A: Theory and Methods 23 Nonlinear Analysis. Theory, Methods & Applications 17 Advances in Difference Equations 17 Boundary Value Problems 12 Nonlinear Analysis. Real World Applications 12 Advanced Nonlinear Studies 10 Applied Mathematics and Computation 10 NoDEA. Nonlinear Differential Equations and Applications 10 Discrete and Continuous Dynamical Systems 9 Proceedings of the American Mathematical Society 9 Journal of Dynamics and Differential Equations 9 Journal of Fixed Point Theory and Applications 8 Annali di Matematica Pura ed Applicata. Serie Quarta 8 Applications of Mathematics 8 Abstract and Applied Analysis 6 Mathematical Methods in the Applied Sciences 6 Topological Methods in Nonlinear Analysis 6 Communications in Contemporary Mathematics 5 Acta Mathematica Sinica. English Series 5 Communications on Pure and Applied Analysis 5 Advances in Nonlinear Analysis 5 AIMS Mathematics 4 Computers & Mathematics with Applications 4 Rocky Mountain Journal of Mathematics 4 ZAMP. Zeitschrift für angewandte Mathematik und Physik 4 Results in Mathematics 4 Acta Applicandae Mathematicae 4 Applied Mathematics Letters 4 Celestial Mechanics and Dynamical Astronomy 4 Discrete and Continuous Dynamical Systems. Series B 3 Bulletin of the Australian Mathematical Society 3 Journal of Mathematical Biology 3 Mathematical Biosciences 3 Nonlinearity 3 Mathematische Nachrichten 3 Monatshefte für Mathematik 3 Transactions of the American Mathematical Society 3 Zeitschrift für Analysis und ihre Anwendungen 3 Annales de l’Institut Henri Poincaré. Analyse Non Linéaire 3 Mathematical and Computer Modelling 3 Proceedings of the Royal Society of Edinburgh. Section A. Mathematics 3 Filomat 3 Discrete Dynamics in Nature and Society 3 Complex Variables and Elliptic Equations 3 Journal of Function Spaces 2 Applicable Analysis 2 Periodica Mathematica Hungarica 2 Chaos, Solitons and Fractals 2 Archiv der Mathematik 2 Journal of Functional Analysis 2 Proceedings of the Edinburgh Mathematical Society. Series II 2 Rendiconti del Seminario Matemàtico e Fisico di Milano 2 Ricerche di Matematica 2 Acta Mathematicae Applicatae Sinica. English Series 2 Automation and Remote Control 2 Journal de Mathématiques Pures et Appliquées. Neuvième Série 2 Russian Mathematics 2 Electronic Journal of Differential Equations (EJDE) 2 Georgian Mathematical Journal 2 Nonlinear Dynamics 2 Journal of Inequalities and Applications 2 Journal of Dynamical and Control Systems 2 Qualitative Theory of Dynamical Systems 2 The ANZIAM Journal 2 Differential Equations 2 Portugaliae Mathematica. Nova Série 2 Acta Mathematica Scientia. Series A. (Chinese Edition) 2 Discrete and Continuous Dynamical Systems. Series S 2 Open Mathematics 1 Israel Journal of Mathematics 1 Journal of the Franklin Institute 1 Journal of Mathematical Physics 1 Lithuanian Mathematical Journal 1 Bulletin of Mathematical Biology 1 Fuzzy Sets and Systems 1 Journal of Computational and Applied Mathematics 1 Journal of Soviet Mathematics 1 Kyungpook Mathematical Journal 1 Manuscripta Mathematica 1 Mathematica Slovaca 1 Mathematische Zeitschrift 1 Numerical Functional Analysis and Optimization 1 Rendiconti del Seminario Matematico della Università di Padova 1 Theoretical Population Biology 1 Mathematical Social Sciences 1 Applied Mathematics and Mechanics. (English Edition) 1 Chinese Annals of Mathematics. Series B 1 Optimization 1 Dynamics and Stability of Systems 1 Journal of Integral Equations and Applications 1 Science in China. Series A 1 Applied Mathematical Modelling 1 Communications in Partial Differential Equations 1 SIAM Journal on Mathematical Analysis 1 International Journal of Bifurcation and Chaos in Applied Sciences and Engineering 1 Journal of Nonlinear Science 1 Set-Valued Analysis 1 Applied Mathematics. Series B (English Edition) ...and 31 more Serials all top 5 Cited in 28 Fields 413 Ordinary differential equations (34-XX) 130 Operator theory (47-XX) 118 Dynamical systems and ergodic theory (37-XX) 61 Partial differential equations (35-XX) 45 Biology and other natural sciences (92-XX) 36 Mechanics of particles and systems (70-XX) 27 Global analysis, analysis on manifolds (58-XX) 14 Calculus of variations and optimal control; optimization (49-XX) 11 Mechanics of deformable solids (74-XX) 9 Systems theory; control (93-XX) 6 Difference and functional equations (39-XX) 6 Fluid mechanics (76-XX) 5 Numerical analysis (65-XX) 4 Functional analysis (46-XX) 3 Real functions (26-XX) 3 Measure and integration (28-XX) 3 General topology (54-XX) 3 Algebraic topology (55-XX) 2 Potential theory (31-XX) 2 Integral equations (45-XX) 2 Probability theory and stochastic processes (60-XX) 2 Optics, electromagnetic theory (78-XX) 1 Linear and multilinear algebra; matrix theory (15-XX) 1 Several complex variables and analytic spaces (32-XX) 1 Geometry (51-XX) 1 Convex and discrete geometry (52-XX) 1 Game theory, economics, finance, and other social and behavioral sciences (91-XX) 1 Information and communication theory, circuits (94-XX) Citations by Year