All Stories

  1. Generalized Nehari manifold and semilinear Schrödinger equation with weak monotonicity condition on the nonlinear term

    Article • Proceedings of the American Mathematical Society, December 2016, American Mathematical Society (AMS)

    Andrzej Szulkin

  2. A logarithmic Schrödinger equation with asymptotic conditions on the potential

    Article • Journal of Mathematical Analysis and Applications, May 2016, Elsevier

    Andrzej Szulkin

  3. Ground states of critical and supercritical problems of Brezis–Nirenberg type

    Article • Annali di Matematica Pura ed Applicata (1923 -), January 2016, Springer Science + Business Media

    Andrzej Szulkin, Prof. Mónica Clapp

  4. Bifurcation from infinity for an asymptotically linear Schrödinger equation

    Article • Journal of Fixed Point Theory and Applications, December 2014, Springer Science + Business Media

    Andrzej Szulkin

  5. Multiple solutions to logarithmic Schrödinger equations with periodic potential

    Article • Calculus of Variations and Partial Differential Equations, November 2014, Springer Science + Business Media

    Andrzej Szulkin

  6. A Supercritical Elliptic Problem in a Cylindrical Shell

    Article • January 2014, Springer Science + Business Media

    Andrzej Szulkin, Prof. Mónica Clapp

  7. Infinitely many solutions for semilinear elliptic problems with sign-changing weight functions

    Article • Applicable Analysis, July 2013, Taylor & Francis

    Andrzej Szulkin

  8. Multiple solutions to nonlinear Schrödinger equations with singular electromagnetic potential

    Article • Journal of Fixed Point Theory and Applications, February 2013, Springer Science + Business Media

    Andrzej Szulkin, Prof. Mónica Clapp

  9. Multiple solutions for a quasilinear Schrödinger equation

    Article • Journal of Differential Equations, February 2013, Elsevier

    Andrzej Szulkin

  10. A Concentration Phenomenon for Semilinear Elliptic Equations

    Article • Archive for Rational Mechanics and Analysis, November 2012, Springer Science + Business Media

    Andrzej Szulkin

  11. Infinitely many solutions for some singular elliptic problems

    Article • Discrete and Continuous Dynamical Systems, September 2012, American Institute of Mathematical Sciences (AIMS)

    Andrzej Szulkin

  12. Sign-changing and symmetry-breaking solutions to singular problems

    Article • Complex Variables and Elliptic Equations, February 2011, Taylor & Francis

    Andrzej Szulkin

  13. Multiple solutions to a nonlinear Schrödinger equation with Aharonov–Bohm magnetic potential

    Article • Nonlinear Differential Equations and Applications NoDEA, December 2009, Springer Science + Business Media

    Andrzej Szulkin, Prof. Mónica Clapp

  14. Ground state solutions for some indefinite variational problems

    Article • Journal of Functional Analysis, December 2009, Elsevier

    Andrzej Szulkin

  15. Schrödinger equation with multiparticle potential and critical nonlinearity

    Article • Topological Methods in Nonlinear Analysis, December 2009, Uniwersytet Mikolaja Kopernika/Nicolaus Copernicus University

    Andrzej Szulkin

  16. Multibump solutions and critical groups

    Article • Transactions of the American Mathematical Society, June 2009, American Mathematical Society (AMS)

    Andrzej Szulkin

  17. Infinite-dimensional homology and multibump solutions

    Article • Journal of Fixed Point Theory and Applications, March 2009, Springer Science + Business Media

    Andrzej Szulkin

  18. Periodic and Bloch Solutions to a Magnetic Nonlinear Schrödinger Equation

    Article • Advanced Nonlinear Studies, January 2009, De Gruyter

    Andrzej Szulkin, Prof. Mónica Clapp

  19. Morse theory and nonlinear differential equations

    Article • January 2008, Elsevier

    Andrzej Szulkin

  20. Bound states for semilinear Schrödinger equations with sign-changing potential

    Article • Calculus of Variations and Partial Differential Equations, January 2007, Springer Science + Business Media

    Andrzej Szulkin

  21. Chapter 2 Hamiltonian Systems: Periodic and Homoclinic Solutions by Variational Methods

    Article • January 2006, Elsevier

    Andrzej Szulkin

  22. p-Laplacian problems where the nonlinearity crosses an eigenvalue

    Article • Discrete and Continuous Dynamical Systems, May 2005, American Institute of Mathematical Sciences (AIMS)

    Andrzej Szulkin

  23. On the Schrödinger equation involving a critical Sobolev exponent and magnetic field

    Article • Topological Methods in Nonlinear Analysis, March 2005, Uniwersytet Mikolaja Kopernika/Nicolaus Copernicus University

    Andrzej Szulkin

  24. A Semilinear Schr�dinger Equation in the Presence of a Magnetic Field

    Article • Archive for Rational Mechanics and Analysis, December 2003, Springer Science + Business Media

    Andrzej Szulkin

  25. A semilinear Schrödinger equation with magnetic field

    Article • March 2003, World Scientific Pub Co Pte Lt

    Andrzej Szulkin

  26. AN ASYMPTOTICALLY PERIODIC SCHRÖDINGER EQUATION WITH INDEFINITE LINEAR PART

    Article • Communications in Contemporary Mathematics, November 2002, World Scientific Pub Co Pte Lt

    Andrzej Szulkin

  27. Homoclinic Orbits for Asymptotically Linear Hamiltonian Systems

    Article • Journal of Functional Analysis, December 2001, Elsevier

    Andrzej Szulkin

  28. Infinite Dimensional Cohomology Groups and Periodic Solutions of Asymptotically Linear Hamiltonian Systems

    Article • Journal of Differential Equations, August 2001, Elsevier

    Andrzej Szulkin

  29. Homoclinic Solutions of Hamiltonian Systems with Symmetry

    Article • Journal of Differential Equations, November 1999, Elsevier

    Andrzej Szulkin

  30. Semilinear Elliptic Equations in $\mathbb{R}^N $ with Almost Periodic or Unbounded Forcing Term

    Article • SIAM Journal on Mathematical Analysis, November 1996, Society for Industrial & Applied Mathematics (SIAM)

    Andrzej Szulkin

  31. On symmetric solutions of an elliptic equation with a nonlinearity involving critical Sobolev exponent

    Article • Nonlinear Analysis, July 1995, Elsevier

    Andrzej Szulkin

  32. Periodic Solutions for a Class of Nonautonomous Hamiltonian Systems

    Article • Journal of Differential Equations, August 1994, Elsevier

    Andrzej Szulkin

  33. Cohomology and Morse theory for strongly indefinite functionals

    Article • Mathematische Zeitschrift, January 1992, Springer Science + Business Media

    Andrzej Szulkin

  34. Existence of Multiple Brake Orbits for a Hamiltonian System

    Article • January 1990, Springer Science + Business Media

    Andrzej Szulkin

  35. A relative category and applications to critical point theory for strongly indefinite functionals

    Article • Nonlinear Analysis, January 1990, Elsevier

    Andrzej Szulkin

  36. An index theory and existence of multiple brake orbits for star-shaped Hamiltonian systems

    Article • Mathematische Annalen, February 1989, Springer Science + Business Media

    Andrzej Szulkin

  37. Minimax Principles for a Class of Lower Semicontinuous Functions and Applications to Nonlinear Boundary Value Problems

    Article • January 1986, Springer Science + Business Media

    Andrzej Szulkin

  38. Existence and nonuniqueness of solutions of a noncoercive elliptic variational inequality

    Article • January 1986, American Mathematical Society (AMS)

    Andrzej Szulkin

  39. Positive solutions of variational inequalities: A degree-theoretic approach

    Article • Journal of Differential Equations, March 1985, Elsevier

    Andrzej Szulkin

  40. On a class of variational inequalities involving gradient operators

    Article • Journal of Mathematical Analysis and Applications, May 1984, Elsevier

    Andrzej Szulkin

  41. R 3 is the Union of Disjoint Circles

    Article • American Mathematical Monthly, November 1983, JSTOR

    Andrzej Szulkin

  42. On the number of solutions of some semilinear elliptic boundary value problems

    Article • Nonlinear Analysis, February 1982, Elsevier

    Andrzej Szulkin

  43. Global structure of level sets of a class of nonlinear Fredholm mappings

    Article • Nonlinear Analysis, January 1981, Elsevier

    Andrzej Szulkin

  44. Local structure of the zero-sets of differentiable mappings and application to bifurcation theory.

    Article • MATHEMATICA SCANDINAVICA, December 1979, Aarhus University Library

    Andrzej Szulkin

  45. An example concerning the topological character of the zero-set of a harmonic function.

    Article • MATHEMATICA SCANDINAVICA, June 1978, Aarhus University Library

    Andrzej Szulkin

  46. Existence and Number of Solutions for a Class of Semilinear Schrödinger Equations

    Article • Springer Science + Business Media

    Andrzej Szulkin