Papageorgiou, Nikolaos S.; Rădulescu, Vicenţiu D.; Repovš, Dušan D. Relaxation methods for optimal control problems. (English) Zbl 1467.49012 Bull. Math. Sci. 10, No. 1, Article ID 2050004, 24 p. (2020). Reviewer: Bülent Karasözen (Ankara) MSC: 49J45 49J20 34A60 PDFBibTeX XMLCite \textit{N. S. Papageorgiou} et al., Bull. Math. Sci. 10, No. 1, Article ID 2050004, 24 p. (2020; Zbl 1467.49012) Full Text: DOI arXiv
Kyritsi, Sophia Th.; O’Regan, Donal; Papageorgiou, Nikolaos S. Periodic problems with the scalar \(p\)-Laplacian resonant at any eigenvalue via critical point methods. (English) Zbl 1297.34027 Adv. Nonlinear Stud. 13, No. 3, 751-772 (2013). MSC: 34B15 34B18 34C25 58E50 PDFBibTeX XMLCite \textit{S. Th. Kyritsi} et al., Adv. Nonlinear Stud. 13, No. 3, 751--772 (2013; Zbl 1297.34027) Full Text: DOI
Jebelean, Petru; Papageorgiou, Nikolaos S. Existence of solutions for a class of nonvariational quasilinear periodic problems. (English) Zbl 1172.34006 Set-Valued Anal. 16, No. 7-8, 923-941 (2008). Reviewer: Francesca Papalini (Ancona) MSC: 34A60 34B15 34C25 47N20 PDFBibTeX XMLCite \textit{P. Jebelean} and \textit{N. S. Papageorgiou}, Set-Valued Anal. 16, No. 7--8, 923--941 (2008; Zbl 1172.34006) Full Text: DOI
Aizicovici, Sergiu; Papageorgiou, Nikolaos S.; Staicu, Vasile Multiple nontrivial solutions for nonlinear periodic problems with the \(p\)-Laplacian. (English) Zbl 1148.34003 J. Differ. Equations 243, No. 2, 504-535 (2007). Reviewer: Anna Capietto (Torino) MSC: 34A60 34B15 34C25 PDFBibTeX XMLCite \textit{S. Aizicovici} et al., J. Differ. Equations 243, No. 2, 504--535 (2007; Zbl 1148.34003) Full Text: DOI
Denkowski, Zdzisław; Gasiński, Leszek; Papageorgiou, Nikolaos S. Existence of positive and of multiple solutions for nonlinear periodic problems. (English) Zbl 1120.34012 Nonlinear Anal., Theory Methods Appl., Ser. A, Theory Methods 66, No. 10, 2289-2314 (2007). Reviewer: Sergei Kornev (Voronezh) MSC: 34B18 34B15 34C25 34A60 58E05 PDFBibTeX XMLCite \textit{Z. Denkowski} et al., Nonlinear Anal., Theory Methods Appl., Ser. A, Theory Methods 66, No. 10, 2289--2314 (2007; Zbl 1120.34012) Full Text: DOI
Hu, Shouchuan; Papageorgiou, Nikolaos S. Positive periodic and homoclinic solutions for nonlinear differential equations with nonsmooth potential. (English) Zbl 1160.34306 Positivity 10, No. 2, 343-363 (2006). MSC: 34A36 34B15 34C25 34C37 34A60 58E05 PDFBibTeX XMLCite \textit{S. Hu} and \textit{N. S. Papageorgiou}, Positivity 10, No. 2, 343--363 (2006; Zbl 1160.34306) Full Text: DOI
Kyritsi, Sophia Th.; Matzakos, Nikolaos; Papageorgiou, Nikolaos S. Nonlinear boundary value problems for second order differential inclusions. (English) Zbl 1081.34020 Czech. Math. J. 55, No. 3, 545-579 (2005). MSC: 34B15 PDFBibTeX XMLCite \textit{S. Th. Kyritsi} et al., Czech. Math. J. 55, No. 3, 545--579 (2005; Zbl 1081.34020) Full Text: DOI EuDML Link
Papageorgiou, Evgenia H.; Papageorgiou, Nikolaos S. Nonlinear second-order periodic systems with non-smooth potential. (English) Zbl 1059.34009 Proc. Indian Acad. Sci., Math. Sci. 114, No. 3, 269-298 (2004). Reviewer: Sotiris K. Ntouyas (Ioannina) MSC: 34A60 37J45 47J30 49J52 49J53 34C37 PDFBibTeX XMLCite \textit{E. H. Papageorgiou} and \textit{N. S. Papageorgiou}, Proc. Indian Acad. Sci., Math. Sci. 114, No. 3, 269--298 (2004; Zbl 1059.34009) Full Text: DOI arXiv
Hu, Shouchuan; Papageorgiou, Nikolaos S. Periodic solutions for nonlinear differential equations with maximal monotone terms. (English) Zbl 1026.34071 Nonlinear Anal., Theory Methods Appl., Ser. A, Theory Methods 52, No. 4, 1317-1330 (2003). Reviewer: S.K.Ntouyas (Ioannina) MSC: 34G25 34A60 34C25 PDFBibTeX XMLCite \textit{S. Hu} and \textit{N. S. Papageorgiou}, Nonlinear Anal., Theory Methods Appl., Ser. A, Theory Methods 52, No. 4, 1317--1330 (2003; Zbl 1026.34071) Full Text: DOI
Kyritsi, Sophia; Matzakos, Nikolaos; Papageorgiou, Nikolaos S. Periodic problems for strongly nonlinear second-order differential inclusions. (English) Zbl 1022.34008 J. Differ. Equations 183, No. 2, 279-302 (2002). Reviewer: Nikolaos G.Yannakakis (Athens) MSC: 34A60 34C25 34G20 PDFBibTeX XMLCite \textit{S. Kyritsi} et al., J. Differ. Equations 183, No. 2, 279--302 (2002; Zbl 1022.34008) Full Text: DOI
Hu, Shouchuan; Papageorgiou, N. S. Nonlinear elliptic problems of Neumann-type. (English) Zbl 1008.35022 Rend. Circ. Mat. Palermo, II. Ser. 50, No. 1, 47-66 (2001). Reviewer: S.A.Tersian (Rousse) MSC: 35J60 35J25 PDFBibTeX XMLCite \textit{S. Hu} and \textit{N. S. Papageorgiou}, Rend. Circ. Mat. Palermo (2) 50, No. 1, 47--66 (2001; Zbl 1008.35022) Full Text: DOI
Papageorgiou, Nikolaos S.; Yannakakis, Nikolaos Nonlinear boundary value problems. (English) Zbl 0952.34035 Proc. Indian Acad. Sci., Math. Sci. 109, No. 2, 211-230 (1999). Reviewer: J.Mawhin (Louvain-La-Neuve) MSC: 34C25 34B15 PDFBibTeX XMLCite \textit{N. S. Papageorgiou} and \textit{N. Yannakakis}, Proc. Indian Acad. Sci., Math. Sci. 109, No. 2, 211--230 (1999; Zbl 0952.34035) Full Text: DOI