Nikolaos S. Papageorgiou

Articles in Scholarly Journals [Incomplete List]

  1. Neumann problems for nonlinear hemivariational inequalities
    Mathematische Nachrichten, vol. 280, no. 3, pp. 290–301, 2007
  2. Solutions and multiple solutions for problems with the p-Laplacian
    Monatshefte für Mathematik, vol. 150, no. 4, pp. 309–326, 2007
  3. Existence and multiplicity of solutions for Neumann problems
    Journal of Differential Equations, vol. 232, no. 1, pp. 1–35, 2007
  4. A multiplicity theorem for problems with the p-Laplacian
    Journal of Functional Analysis, vol. 244, no. 1, pp. 63–77, 2007
  5. Existence and multiplicity of solutions for semilinear hemivariational inequalities at resonance
    Nonlinear Analysis, vol. 66, no. 6, pp. 1329–1340, 2007
  6. Existence of positive and of multiple solutions for nonlinear periodic problems
    Nonlinear Analysis: Theory, Methods & Applications, vol. 66, no. 10, pp. 2289–2314, 2007
  7. The method of upper–lower solutions for nonlinear second order differential inclusions
    Nonlinear Analysis: Theory, Methods & Applications, vol. 67, no. 3, pp. 708–726, 2007
  8. Multiple solutions for strongly resonant periodic systems
    Nonlinear Analysis: Theory, Methods & Applications, vol. 67, no. 6, pp. 1895–1907, 2007
  9. On the existence of two nontrivial solutions of periodic problems with operators of p-Laplacian type
    Differential Equations, vol. 43, no. 2, pp. 157–163, 2007
  10. Analysis and Applications, vol. 4, no. 1, p. 1, 2006
  11. Variational methods for nonlinear, nonsmooth second-order periodic systems†
    Optimization, vol. 55, no. 1-2, pp. 37–64, 2006
  12. SEMILINEAR HEMIVARIATIONAL INEQUALITIES WITH STRONG RESONANCE AT INFINITY1
    Acta Mathematica Scientia, vol. 26, no. 1, pp. 59–73, 2006
  13. Periodic solutions for second order differential inclusions with the scalar p-Laplacian?
    Journal of Mathematical Analysis and Applications, vol. 322, no. 2, pp. 913–929, 2006
  14. “Two Nontrivial Critical Points for Nonsmooth Functionals via Local Linking and Applications”
    Journal of Global Optimization, vol. 34, no. 2, pp. 219–244, 2006
  15. Nontrivial Solutions for Resonant Hemivariational Inequalities
    Journal of Global Optimization, vol. 34, no. 3, pp. 317–337, 2006
  16. Multiple Positive Solutions for Eigenvalue Problems of Hemivariational Inequalities
    Positivity, vol. 10, no. 3, pp. 491–515, 2006
  17. Positive Periodic and Homoclinic Solutions for Nonlinear Differential Equations with Nonsmooth Potential
    Positivity, vol. 10, no. 2, pp. 343–363, 2006
  18. Nonsmooth generalized guiding functions for periodic differential inclusions
    Nonlinear Differential Equations and Applications NoDEA, vol. 13, no. 1, pp. 43–66, 2006
  19. Positive solutions and multiple solutions for periodic problems driven by scalarp -Laplacian
    Mathematische Nachrichten, vol. 279, no. 12, pp. 1321–1334, 2006
  20. Extremal solutions for nonlinear second order differential inclusions
    Mathematische Nachrichten, vol. 278, no. 1-2, pp. 43–52, 2005
  21. Second Order Nonlinear Evolution Inclusions I: Existence and Relaxation Results
    Acta Mathematica Sinica, English Series, vol. 21, no. 5, pp. 977–996, 2005
  22. Second Order Nonlinear Evolution Inclusions II: Structure of the Solution Set
    Acta Mathematica Sinica, English Series, vol. 22, no. 1, pp. 195–206, 2005
  23. Pairs of positive solutions for nonlinear elliptic equations with the p-Laplacian and a nonsmooth potential
    Annali di Matematica Pura ed Applicata, vol. 184, no. 4, pp. 449–472, 2005
  24. Nonlinear Boundary Value Problems for Second Order Differential Inclusions
    Czechoslovak Mathematical Journal, vol. 55, no. 3, pp. 545–579, 2005
  25. Extremal Solutions and Strong Relaxation for Second Order Multivalued Boundary Value Problems
    Czechoslovak Mathematical Journal, vol. 55, no. 4, pp. 827–844, 2005
  26. On the Existence of Positive Solutions for Hemivariational Inequalities Driven by the p-Laplacian
    Journal of Global Optimization, vol. 31, no. 1, pp. 173–189, 2005
  27. A multiplicity result for semilinear resonant elliptic problems with nonsmooth potential
    Nonlinear Analysis, vol. 61, no. 1-2, pp. 61–75, 2005
  28. Nonsmooth critical point theory on closed convex sets and nonlinear hemivariational inequalities
    Nonlinear Analysis, vol. 61, no. 3, pp. 373–403, 2005
  29. On some elliptic hemivariational and variational–hemivaritional inequalities
    Nonlinear Analysis, vol. 62, no. 4, pp. 757–774, 2005
  30. SOLUTIONS FOR DOUBLY RESONANT NONLINEAR NON-SMOOTH PERIODIC PROBLEMS
    Proceedings of the Edinburgh Mathematical Society, vol. 48, no. 1, pp. 199–211, 2005
  31. Positive solutions for nonlinear hemivariational inequalities
    Journal of Mathematical Analysis and Applications, vol. 310, no. 1, pp. 161–176, 2005
  32. Solvability of nonlinear variational–hemivariational inequalities
    Journal of Mathematical Analysis and Applications, vol. 311, no. 1, pp. 162–181, 2005
  33. Proceedings of the American Mathematical Society, vol. 133, no. 08, pp. 2369–2377, 2005
  34. Proceedings of the American Mathematical Society, vol. 132, no. 02, pp. 429–435, 2004
  35. Solutions for nonlinear variational inequalities with a nonsmooth potential
    Abstract and Applied Analysis, vol. 2004, no. 8, pp. 635–649, 2004
  36. Multivalued p-Lienard systems
    Fixed Point Theory and Applications, vol. 2004, no. 2, pp. 71–80, 2004
  37. Periodic Solutions for Second Order Equations with the Scalar p-Laplacian and Nonsmooth Potential
    Funkcialaj Ekvacioj, vol. 47, no. 1, pp. 107–117, 2004
  38. Existence of Solutions and of Multiple Solutions for Nonlinear Nonsmooth Periodic Systems
    Czechoslovak Mathematical Journal, vol. 54, no. 2, pp. 347–371, 2004
  39. Common Fixed Point Theory for Multivalued Contractive Maps of Reich Type in Uniform Spaces
    Applicable Analysis, vol. 83, no. 1, pp. 37–47, 2004
  40. Quasilinear hemivariational inequalities with strong resonance at infinity
    Nonlinear Analysis, vol. 56, no. 3, pp. 331–345, 2004
  41. Multiple solutions for nonlinear elliptic equations at resonance with a nonsmooth potential
    Nonlinear Analysis, vol. 56, no. 8, pp. 1211–1234, 2004
  42. Periodic problems with asymmetric nonlinearities and nonsmooth potentials
    Nonlinear Analysis, vol. 58, no. 5-6, pp. 683–702, 2004
  43. Multiple solutions of constant sign for nonlinear nonsmooth eigenvalue problems near resonance
    Calculus of Variations and Partial Differential Equations, vol. 20, no. 1, pp. 1–24, 2004
  44. Existence Theorems for Periodic Differential Inclusions in R N
    Acta Mathematicae Applicatae Sinica, English Series, vol. 20, no. 2, pp. 179–190, 2004
  45. Two nontrivial solutions for strongly resonant nonlinear elliptic equations
    Archiv der Mathematik, vol. 83, no. 1, 2004
  46. Solvability of Semilinear Hemivariational Inequalities at Resonance Using Generalized Landesman?Lazer Conditions
    Monatshefte f�r Mathematik, vol. 142, no. 3, 2003
  47. Strongly nonlinear multivalued boundary value problems
    Nonlinear Analysis, vol. 52, no. 4, pp. 1219–1238, 2003
  48. Periodic solutions for nonlinear differential equations with maximal monotone terms
    Nonlinear Analysis, vol. 52, no. 4, pp. 1317–1330, 2003
  49. On the convergence of solutions of multivalued parabolic equations and applications
    Nonlinear Analysis, vol. 54, no. 4, pp. 667–682, 2003
  50. ON THE EXISTENCE OF MULTIPLE PERIODIC SOLUTIONS FOR EQUATIONS DRIVEN BY THE $p$ -LAPLACIAN AND WITH A NON-SMOOTH POTENTIAL
    Proceedings of the Edinburgh Mathematical Society, vol. 46, no. 1, pp. 229–249, 2003
  51. Proceedings of the American Mathematical Society, vol. 131, no. 08, pp. 2359–2370, 2003
  52. Czechoslovak Mathematical Journal, vol. 53, no. 1, pp. 135–159, 2003
  53. Existence theorems for elliptic hemivariational inequalities involving the p-Laplacian
    Abstract and Applied Analysis, vol. 7, no. 5, pp. 259–277, 2002
  54. Minimax control of nonlinear evolution equations
    Applied Mathematics and Computation, vol. 131, no. 2-3, pp. 271–297, 2002
  55. Periodica Mathematica Hungarica, vol. 45, no. 1/2, pp. 43–63, 2002
  56. An obstacle problem for nonlinear hemivariational inequalities at resonance
    Journal of Mathematical Analysis and Applications, vol. 276, no. 1, pp. 292–313, 2002
  57. Mathematische Nachrichten, vol. 233-234, no. 1, pp. 201–219, 2002
  58. Mathematische Nachrichten, vol. 244, no. 1, pp. 5–25, 2002
  59. Periodic Problems for Strongly Nonlinear Second-Order Differential Inclusions
    Journal of Differential Equations, vol. 183, no. 2, pp. 279–302, 2002
  60. Minimax Control of Nonlinear Evolution Equations
    Journal of Mathematical Analysis and Applications, vol. 259, no. 2, pp. 509–536, 2001
  61. Solutions and multiple solutions for quasilinear hemivariational inequalities at resonance
    Proceedings of the Royal Society of Edinburgh: Section A Mathematics, vol. 131, no. 05, p. 1091, 2001
  62. Periodica Mathematica Hungarica, vol. 40, no. 1, pp. 13–29, 2000
  63. Existence theorems for quasilinear multivalued boundary value problems in R N
    Glasgow Mathematical Journal, vol. 42, no. 3, pp. 359–369, 2000
  64. Czechoslovak Mathematical Journal, vol. 50, no. 4, pp. 803–823, 2000
  65. Czechoslovak Mathematical Journal, vol. 50, no. 3, pp. 467–497, 2000
  66. Existence of solutions for quasilinear second order differential inclusions with nonlinear boundary conditions
    Journal of Computational and Applied Mathematics, vol. 113, no. 1-2, pp. 51–64, 2000
  67. Nonmonotone, nonlinear evolution inclusions
    Mathematical and Computer Modelling, vol. 32, no. 11-13, pp. 1345–1365, 2000
  68. Nonlinear Hemivariational Inequalities at Resonance,
    Journal of Mathematical Analysis and Applications, vol. 244, no. 1, pp. 200–213, 2000
  69. Nonlinear boundary value problems with maximal monotone terms
    Aequationes Mathematicae, vol. 59, no. 1, pp. 93–107, 2000
  70. Multiple solutions for nonlinear discontinuous strongly resonant elliptic problems
    Abstract and Applied Analysis, vol. 5, no. 2, pp. 119–135, 2000
  71. An application of a noncompactness technique to an investigation of the existence of solutions to a nonlocal multivalued Darboux problem
    Journal of Applied Mathematics and Stochastic Analysis, vol. 12, no. 2, pp. 179–190, 1999
  72. Nonconvex evolution inclusions generated by time-dependent subdifferential operators
    Journal of Applied Mathematics and Stochastic Analysis, vol. 12, no. 3, pp. 233–252, 1999
  73. Proceedings of the American Mathematical Society, vol. 127, no. 01, pp. 89–95, 1999
  74. Proceedings of the American Mathematical Society, vol. 127, no. 01, pp. 95–104, 1999
  75. Nonlinear Elliptic Eigenvalue Problems with Discontinuities
    Journal of Mathematical Analysis and Applications, vol. 233, no. 1, pp. 406–424, 1999
  76. Three Nontrivial Solutions for a Quasilinear Elliptic Differential Equation at Resonance with Discontinuous Right Hand Side
    Journal of Mathematical Analysis and Applications, vol. 238, no. 2, pp. 477–490, 1999
  77. Acta Mathematica Hungarica, vol. 83, no. 4, pp. 303–314, 1999
  78. Existence and Relaxation Theorems for Nonlinear Multivalued Boundary Value Problems
    Applied Mathematics and Optimization, vol. 39, no. 2, pp. 257–279, 1999
  79. Acta Mathematica Hungarica, vol. 78, no. 3, pp. 175–197, 1998
  80. Czechoslovak Mathematical Journal, vol. 48, no. 2, pp. 291–312, 1998
  81. An Existence Theorem for Evolution Inclusions Involving Opposite Monotonicities
    Journal of Mathematical Analysis and Applications, vol. 222, no. 1, pp. 1–14, 1998
  82. Existence and Relaxation Results for Nonlinear Second-Order Multivalued Boundary Value Problems in ?N
    Journal of Differential Equations, vol. 147, no. 1, pp. 123–154, 1998
  83. On the Existence of Solutions for Nonlinear Parabolic Problems with Nonmonotone Discontinuities
    Journal of Mathematical Analysis and Applications, vol. 205, no. 2, pp. 434–453, 1997
  84. Properties of the Solution Set of Nonlinear Evolution Inclusions
    Applied Mathematics and Optimization, vol. 36, no. 1, pp. 1–20, 1997
  85. Extremal solutions for nonlinear parabolic problems with discontinuities
    Monatshefte f�r Mathematik, vol. 124, no. 2, pp. 119–131, 1997
  86. Czechoslovak Mathematical Journal, vol. 47, no. 3, pp. 409–424, 1997
  87. Czechoslovak Mathematical Journal, vol. 47, no. 1, pp. 135–148, 1997
  88. Transactions of the American Mathematical Society, vol. 349, no. 04, pp. 1421–1437, 1997
  89. Random evolution inclusions of the subdifferential type
    Stochastic Analysis and Applications, vol. 15, no. 5, pp. 801–821, 1997
  90. Extremal Solutions for Semilinear Obstacle Problems
    Applicable Analysis, vol. 60, no. 1, pp. 37–47, 1996
  91. Infinite-horizon continuous-time growth models
    International Journal of Systems Science, vol. 27, no. 4, pp. 373–378, 1996
  92. Convergence theorems for set-valued amarts and uniform amarts
    Analysis Mathematica, vol. 22, no. 2, pp. 147–161, 1996
  93. Optimal control and admissible relaxation for subdifferential evolution inclusions
    Periodica Mathematica Hungarica, vol. 33, no. 1, pp. 1–22, 1996
  94. Optimal Control and Admissible Relaxation of Uncertain Nonlinear Elliptic Systems
    Journal of Mathematical Analysis and Applications, vol. 197, no. 1, pp. 27–41, 1996
  95. Existence Theorems for Nonlinear Boundary Value Problems for Second Order Differential Inclusions
    Journal of Differential Equations, vol. 132, no. 1, pp. 107–125, 1996
  96. On the Existence of Extremal Periodic Solutions for Nonlinear Parabolic Problems with Discontinuities
    Journal of Differential Equations, vol. 132, no. 1, pp. 179–201, 1996
  97. Transition vector measures and multimeasures and parametric set-valued integrals
    Analysis Mathematica, vol. 21, no. 4, pp. 299–311, 1995
  98. On the properties of the solution set of semilinear evolution inclusions
    Nonlinear Analysis, vol. 24, no. 12, pp. 1683–1712, 1995
  99. Minimax control of nonlinear evolution equations
    Applied Mathematics and Computation, vol. 68, no. 2-3, pp. 217–236, 1995
  100. On Parametric Evolution Inclusions of the Subdifferential Type with Applications to Optimal Control Problems
    Transactions of the American Mathematical Society, vol. 347, no. 1, p. 203, 1995
  101. Generalizations of Browder's Degree Theory
    Transactions of the American Mathematical Society, vol. 347, no. 1, p. 233, 1995
  102. On the Conditional Expectation and Convergence Properties of Random Sets
    Transactions of the American Mathematical Society, vol. 347, no. 7, p. 2495, 1995
  103. On the Existence of Periodic Solutions for Nonconvex-Valued Differential Inclusions in ℝ N
    Proceedings of the American Mathematical Society, vol. 123, no. 10, p. 3043, 1995
  104. Delay Differential Inclusions with Constraints
    Proceedings of the American Mathematical Society, vol. 123, no. 7, p. 2141, 1995
  105. Optimal Programs and Their Price Characterization in a Multisector Growth Model with Uncertainty
    Proceedings of the American Mathematical Society, vol. 122, no. 1, p. 227, 1994
  106. Existence of solutions for second-order evolution inclusions
    Journal of Applied Mathematics and Stochastic Analysis, vol. 7, no. 4, pp. 525–535, 1994
  107. Sensitivity analysis for a continuous time infinite horizon growth model
    Applied Mathematics and Computation, vol. 60, no. 1, pp. 43–53, 1994
  108. Cone-valued Lyapunov functions and stability theory
    Nonlinear Analysis, vol. 22, no. 3, pp. 381–390, 1994
  109. Periodic solutions of nonlinear evolution inclusions
    Journal of Computational and Applied Mathematics, vol. 52, no. 1-3, pp. 277–286, 1994
  110. On the Topological Regularity of the Solution Set of Differential Inclusions with Constraints
    Journal of Differential Equations, vol. 107, no. 2, pp. 280–289, 1994
  111. Boundary Value Problems for Nonconvex Differential Inclusions
    Journal of Mathematical Analysis and Applications, vol. 185, no. 1, pp. 146–160, 1994
  112. A Sensitivity Analysis of Volterra Integral Inclusions with Applications to Optimal Control Problems
    Journal of Mathematical Analysis and Applications, vol. 186, no. 1, pp. 97–119, 1994
  113. Controllability of Infinite Dimensional Systems with Control Constraints
    Journal of Mathematical Analysis and Applications, vol. 186, no. 2, pp. 523–533, 1994
  114. On Fatou's Lemma and Parametric Integrals for Set-Valued Functions
    Journal of Mathematical Analysis and Applications, vol. 187, no. 3, pp. 809–825, 1994
  115. Extremal Solutions of Functional Differential Inclusions
    Journal of Mathematical Analysis and Applications, vol. 173, no. 2, pp. 430–435, 1993
  116. Infinite Dimensional Parametric Optimal Control Problems
    Mathematische Nachrichten, vol. 162, no. 1, pp. 17–38, 1993
  117. Optimal control of nonlinear evolution equations with nonmonotone nonlinearities
    Journal of Optimization Theory and Applications, vol. 77, no. 3, pp. 643–660, 1993
  118. On the “bang-bang” principle for nonlinear evolution inclusions
    Aequationes Mathematicae, vol. 45, no. 2-3, pp. 267–280, 1993
  119. Optimal control, sensitivity analysis and relaxation of maximal monotone integrodifferential inclusions inR N
    Periodica Mathematica Hungarica, vol. 27, no. 3, pp. 155–175, 1993
  120. Existence of support prices for a discrete time growth model with uncertainty
    Applied Mathematics and Computation, vol. 53, no. 1, pp. 27–43, 1993
  121. Periodic solutions of nonconvex differential inclusions
    Applied Mathematics Letters, vol. 6, no. 5, pp. 99–101, 1993
  122. Walras allocations in infinite dimensional economies
    Applied Mathematics Letters, vol. 6, no. 1, pp. 3–6, 1993
  123. The method of upper and lower solutions and monotone technique for impulsive differential equations with variable moments
    Applicable Analysis, vol. 51, no. 1, pp. 41–58, 1993
  124. Minimization of nonsmooth integral functionals
    International Journal of Mathematics and Mathematical Sciences, vol. 15, no. 4, pp. 673–679, 1992
  125. Extremal solutions to a class of multivalued integral equations in Banach space
    Journal of Applied Mathematics and Stochastic Analysis, vol. 5, no. 3, pp. 205–220, 1992
  126. Existence and sensitivity analysis of optimal paths in an economic growth model with infinite planning horizon
    Mathematical and Computer Modelling, vol. 16, no. 10, pp. 17–23, 1992
  127. On the existence of weakly maximal programs for a multisector economy with consumption
    Applied Mathematics and Computation, vol. 48, no. 2-3, pp. 177–186, 1992
  128. Maximal elements for non-ordered preferences
    Applied Mathematics Letters, vol. 5, no. 5, pp. 7–9, 1992
  129. Weak convergence of random sets in Banach spaces*1
    Journal of Mathematical Analysis and Applications, vol. 164, no. 2, pp. 571–589, 1992
  130. On the optimal control of strongly nonlinear evolution equations
    Journal of Mathematical Analysis and Applications, vol. 164, no. 1, pp. 83–103, 1992
  131. Optimal control and relaxation of nonlinear elliptic systems
    Monatshefte f�r Mathematik, vol. 114, no. 3-4, pp. 209–244, 1992
  132. On the dependence of the solutions and optimal solutions of control problems on the control constraint set
    Periodica Mathematica Hungarica, vol. 25, no. 2, pp. 133–152, 1992
  133. Convergence theorems for set-valued martingales and semimartingales
    Analysis Mathematica, vol. 18, no. 4, pp. 283–293, 1992
  134. On U(?)-invariance for finite and infinite dimensional control systems
    Acta Mathematica Hungarica, vol. 59, no. 3-4, pp. 309–318, 1992
  135. A convergence result for a sequence of distributed-parameter optimal control problems
    Journal of Optimization Theory and Applications, vol. 68, no. 2, pp. 305–320, 1991
  136. On the Existence of Optimal Controls for a Class of Nonlinear Infinite Dimensional Systems
    Mathematische Nachrichten, vol. 150, no. 1, pp. 203–217, 1991
  137. Radon—Nikodym theorems for multimeasures and transition multimeasures
    Analysis Mathematica, vol. 17, no. 2, pp. 141–152, 1991
  138. On the dependence of the solutions and optimal solutions of control problems on the control constraint set1, 2
    Journal of Mathematical Analysis and Applications, vol. 158, no. 2, pp. 427–447, 1991
  139. An existence theorem for an optimal economic growth problem with infinite planning horizon
    Applied Mathematics and Computation, vol. 44, no. 3, pp. 249–259, 1991
  140. On the sensitivity and relaxability of optimal control problems governed by nonlinear evolution equations with state constraints
    Nonlinear Analysis, vol. 17, no. 8, pp. 741–757, 1991
  141. Radon-Nikodym Theorems for Multimeasures and Transition Multimeasures
    Proceedings of the American Mathematical Society, vol. 111, no. 2, p. 465, 1991
  142. Variational stability of infinite-dimensional optimal control problems
    Dynamical Systems, vol. 6, no. 1, pp. 17–32, 1991
  143. Relation betwe