DEG1 (Differential Equations Group Of North-East) is an Italian mathematical platform with the aim of gathering the contributions of researchers, former members and collaborators of the differential equations research groups of the academic institutions in Friuli-Venezia Giulia: University of Trieste, University of Udine and SISSA.
DEG1 is based on the sharing of news, ideas, projects and other academic stuff. Below you can find a collection of recent papers and preprints of the group members, along with their research activities and projects. Some scientific events of interest for the group are also posted.



DEG1 events

The group organises periodic meetings. The list of past events is available at the page:
past DEG1 events

Twice a month webinars are held in order to keep the group up-to-date with the latest research products of its members:
DEG1 Webinars

Events of interest

DEG1 Christmas Meeting 2019
Udine, Italy
December 20, 2019
Poster: pdf-162.png

[workshop, school] Brescia Winter School on Reaction Diffusion PDE’s and Optimization
Brescia, 13-15 Jan 2020

[school] Mathematical Modelling of Ecological and Socioeconomic Systems
Senegal, 27-31 Jan 2020

[workshop] Nonlinear Meeting in Milan 2020
Milano, 30-31 Jan 2020

[school] I-CELMECH Training School
Milano, 3-7 Feb 2020

[workshop] 11th Conference DSABNS
Trento, 4-7 Feb 2020

[workshop] The 13th AIMS Conference on Dynamical Systems, Differential Equations and Applications
Atlanta (US), 5-9 Jun 2020

[workshop] 8th European Congress of Mathematics
Portorož (Slovenia), 5-11 July 2020

[workshop] DSDFE 2020 – Dynamical Systems, Difference and Functional Equations
Krynica‑Zdrój (Poland), 13‑18 Sept 2020

[workshop] Geometric and Variational Methods in Celestial Mechanics
Oaxaca (Mexico), 4-9 Oct 2020

[workshop] DS21 – SIAM Conference on Applications of Dynamical Systems
Portland (US), 23-27 May 2021

[conference] ICM 2022 – International Congress of Mathematicians
Saint Petersburg (Russia), 6-14 July 2022



  • S. Arlot, S. Marmi, D. Papini, Coupling the Yoccoz-Birkeland population model with price dynamics: chaotic livestock commodities market cycles. pdf-162.png
  • A. Boscaggin, F. Colasuonno, B. Noris, A priori bounds and multiplicity of positive solutions for p-Laplacian Neumann problems with sub-critical growth. pdf-162.png
  • A. Boscaggin, F. Colasuonno, B. Noris, Multiple positive solutions for a class of p-Laplacian Neumann problems without growth conditions. pdf-162.png
  • A. Boscaggin, F. Colasuonno, B. Noris, Positive radial solutions for the Minkowski-curvature equation with Neumann boundary conditions. pdf-162.png
  • A. Boscaggin, W. Dambrosio, G. Feltrin, S. Terracini, Parabolic arcs for time-dependent perturbations of the Kepler problem. pdf-162.png
  • A. Boscaggin, W. Dambrosio, D. Papini, Periodic solutions to a forced Kepler problem in the plane. pdf-162.png
  • A. Boscaggin, G. Feltrin, Positive periodic solutions to an indefinite Minkowski-curvature equation. pdf-162.png
  • A. Boscaggin, G. Feltrin, E. Sovrano, High multiplicity and chaos for an indefinite problem arising from genetic models. pdf-162.png
  • A. Boscaggin, A. Fonda, M. Garrione, An infinite-dimensional version of the Poincaré-Birkhoff theorem on the Hilbert cube. pdf-162.png
  • A. Boscaggin, M. Garrione, Pairs of nodal solutions for a Minkowski-curvature boundary value problem in a ball. pdf-162.png
  • A. Boscaggin, R. Ortega, L. Zhao, Periodic solutions and regularization of a Kepler problem with time-dependent perturbation. pdf-162.png
  • T. Dondè, Uniform persistence in a prey-predator model with a diseased predator. pdf-162.png
  • T. Dondè, F. Zanolin, Multiple periodic solutions for one-sided sublinear systems: A refinement of the Poincaré-Birkhoff approach. pdf-162.png
  • G. Feltrin, P. Gidoni, Multiplicity of clines for systems of indefinite differential equations arising from a multilocus population genetics model pdf-162.png
  • G. Feltrin, E. Sovrano, F. Zanolin, Periodic solutions to parameter-dependent equations with a φ-Laplacian type operator. pdf-162.png
  • R. Folino, M. Garrione, M. Strani, Stability properties and dynamics of solutions to viscous conservation laws with mean curvature operator. pdf-162.png
  • A. Fonda, A generalization of the parallelogram law to higher dimensions. pdf-162.png
  • A. Fonda, A logarithmic spiral in the complex plane interpolating between the exponential and the circular functions. pdf-162.png
  • A. Fonda, P. Gidoni, Coupling linearity and twist: an extension of the Poincaré–Birkhoff Theorem for Hamiltonian systems. pdf-162.png
  • A. Fonda, G. Klun, On the topological degree of planar maps avoiding normal cones. pdf-162.png
  • A. Fonda, G. Klun, A. Sfecci, Periodic solutions of nearly integrable Hamiltonian systems bifurcating from infinite-dimensional tori. pdf-162.png
  • A. Fonda, J. Mawhin, M. Willem, Multiple periodic solutions of infinite-dimensional pendulum-like equations. pdf-162.png
  • M. Garrione, Vanishing diffusion limits for planar fronts in bistable models with saturation. pdf-162.png
  • M. Garrione, F. Gazzola, Linear and nonlinear equations for beams and degenerate plates with multiple intermediate piers. pdf-162.png
  • M. Garrione, M. Strani, Heteroclinic traveling fronts for a generalized Fisher-Burgers equation with saturating diffusion. pdf-162.png
  • R. Musina, A.I. Nazarov, A note on truncations in fractional Sobolev spaces. pdf-162.png
  • R. Musina, A.I. Nazarov, Sobolev inequalities for Neumann Laplacians on half spaces. pdf-162.png
  • R. Musina, A.I. Nazarov, Strong maximum principles for fractional Laplacians. pdf-162.png
  • R. Musina, F. Zuddas, Embedded loops in the hyperbolic plane with prescribed, almost constant curvature. pdf-162.png
  • R. Musina, F. Zuddas, Multiple closed K-magnetic geodesics on S2. pdf-162.png
  • A. Sfecci, Double resonance in Sturm-Liouville planar boundary value problems. pdf-162.png
  • E. Sovrano, F. Zanolin, The Ambrosetti-Prodi periodic problem: different routes to complex dynamics. pdf-162.png

Publications 2019

  • F. Alessio, P. Montecchiari, A. Sfecci, Saddle solutions for a class of systems of periodic and reversible semilinear elliptic equations, Netw. Heterog. Media. link-16.png
  • A. Boscaggin, M. Garrione, A counterexample to a priori bounds under the Ahmad-Lazer-Paul condition, Rend. Istit. Mat. Univ. Trieste pdf-162.png
  • C. Corsato, C. De Coster, N. Flora, P. Omari, Radial solutions of the Dirichlet problem for a class of quasilinear elliptic equations arising in optometry, Nonlinear Anal. link-16.png pdf-162.png
  • J. Chu, M. Garrione, F. Gazzola, Stability analysis in some strongly prestressed rectangular plates, Evol. Equ. Control Theorylink-16.png pdf-162.png
  • F. Dalbono, M. Franca, A. Sfecci, Multiplicity of ground states for the scalar curvature equation, Ann. Mat. Pura Appl. link-16.png pdf-162.png
  • M. Garrione, A. Margheri, C. Rebelo, Nonautonomous nonlinear ODEs: Nonresonance conditions and rotation numbers, J. Math. Anal. Appl. link-16.png pdf-162.png
  • M. Garrione, M. Strani, Monotone wave fronts for (p,q)-Laplacian driven reaction-diffusion equations, Discrete Contin. Dyn. Syst. Ser. S link-16.png pdf-162.png
  • P. Gidoni, G.B. Maggiani, R. Scala, Existence and regularity of solutions for an evolution model of perfectly plastic plates, Commun. Pure Appl. Anal. link-16.png pdf-162.png
  • P. Gidoni, A. Margheri, Lower bound on the number of periodic solutions for asymptotically linear planar Hamiltonian systems, Discrete Contin. Dyn. Syst. link-16.png pdf-162.png
  • R. Musina, A.I. Nazarov, Fractional Hardy–Sobolev inequalities on half spaces, Nonlinear Anal. link-16.png pdf-162.png
  • A. Sfecci, On the structure of radial solutions for some quasilinear elliptic equations, J. Math. Anal. Appl. link-16.png pdf-162.png

Past publications

You can find a list here.

Continue reading “Papers”


Progetti di Ricerca GNAMPA 2018

  • Proprieta qualitative di alcuni problemi ai limiti – Qualitative properties of some nonlinear boundary value problems
    P.I.: Alessandro Fonda. Participants: Chiara Corsato, Franco Obersnel, Pierpaolo Omari, Duccio Papini, Fabio Zanolin
  • Problemi analitici e geometrici associati a EDP non-lineari ellittiche e paraboliche
    P.I.: Matteo Muratori. Participants: Chiara Bianchini, Maurizio Garrione, Nunzia Gavitone, Alberto Roncoroni

Progetti di Ricerca di Interesse Dipartimentale (PRID) 2017

  • SiDiA – Sistemi Dinamici e Applicazioni
    P.I.: Fabio Zanolin. Participants: Alessia Andò, Franco Blanchini, Dimitri Breda, Tobia Dondè, Oltiana Gjata, Davide Liessi, Giovanni Panti, Duccio Papini, Francesca Scarabel, Elisa Sovrano, Rodica Toader, Rossana Vermiglio

Past projects

You can find a list here.