Li, Yaohong; Wang, Yongqing; O’Regan, Donal; Xu, Jiafa Existence of solutions for a periodic boundary value problem with impulse and fractional derivative dependence. (English) Zbl 1484.34030 J. Math. 2020, Article ID 6625056, 16 p. (2020). MSC: 34A08 34B15 34C25 45G10 47H10 PDFBibTeX XMLCite \textit{Y. Li} et al., J. Math. 2020, Article ID 6625056, 16 p. (2020; Zbl 1484.34030) Full Text: DOI
Yang, Peng; Wang, Jinrong; O’Regan, Donal Periodicity of non-homogeneous trajectories for non-instantaneous impulsive heat equations. (English) Zbl 1430.34021 Electron. J. Differ. Equ. 2020, Paper No. 18, 7 p. (2020). MSC: 34A37 34B37 34K30 35K05 PDFBibTeX XMLCite \textit{P. Yang} et al., Electron. J. Differ. Equ. 2020, Paper No. 18, 7 p. (2020; Zbl 1430.34021) Full Text: Link
Nowakowski, Andrzej; O’Regan, Donal Periodic Navier solutions for the plate equation with non-monotone nonlinearities: the multidimensional case. (English) Zbl 1379.35006 Proc. Edinb. Math. Soc., II. Ser. 60, No. 1, 203-230 (2017). MSC: 35B10 35A15 35L76 74K20 35L35 PDFBibTeX XMLCite \textit{A. Nowakowski} and \textit{D. O'Regan}, Proc. Edinb. Math. Soc., II. Ser. 60, No. 1, 203--230 (2017; Zbl 1379.35006) Full Text: DOI
Lian, Hairong; Wang, Dongli; O’Regan, Donal; Agarwal, Ravi P. Periodic solutions of nonautonomous second-order differential equations with a \(p\)-Laplacian. (English) Zbl 1366.34060 Analysis, München 37, No. 1, 1-11 (2017). Reviewer: Yang Yang (Wuxi) MSC: 34C25 34B15 58E30 37C60 34E10 PDFBibTeX XMLCite \textit{H. Lian} et al., Analysis, München 37, No. 1, 1--11 (2017; Zbl 1366.34060) Full Text: DOI
Nowakowski, Andrzej; O’Regan, Donal Periodic solutions for forced vibrations of wave equation with general nonlinearities: the multidimensional case. (English) Zbl 1312.35133 Appl. Anal. 94, No. 2, 399-408 (2015). MSC: 35L71 35L20 35B10 PDFBibTeX XMLCite \textit{A. Nowakowski} and \textit{D. O'Regan}, Appl. Anal. 94, No. 2, 399--408 (2015; Zbl 1312.35133) Full Text: DOI
Guo, Chengjun; O’Regan, Donal; Xu, Yuantong; Agarwal, Ravi P. Existence of homoclinic orbits of a class of second-order differential difference equations. (English) Zbl 1285.34062 Dyn. Contin. Discrete Impuls. Syst., Ser. B, Appl. Algorithms 20, No. 6, 675-690 (2013). MSC: 34K10 34K13 34K18 58E50 PDFBibTeX XMLCite \textit{C. Guo} et al., Dyn. Contin. Discrete Impuls. Syst., Ser. B, Appl. Algorithms 20, No. 6, 675--690 (2013; Zbl 1285.34062) Full Text: Link
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
Agarwal, Ravi P.; O’Regan, Donal; Wong, Patricia J. Y. Constant-sign solutions of systems of integral equations. (English) Zbl 1283.45002 Cham: Springer (ISBN 978-3-319-01254-4/hbk; 978-3-319-01255-1/ebook). xiv, 648 p. (2013). Reviewer: Gustaf Gripenberg (Hut) MSC: 45G15 45B05 45D05 45-02 45C05 PDFBibTeX XMLCite \textit{R. P. Agarwal} et al., Constant-sign solutions of systems of integral equations. Cham: Springer (2013; Zbl 1283.45002) Full Text: DOI
Chen, Yuqing; O’Regan, Donal; Agarwal, Ravi P. Anti-periodic solutions for evolution equations associated with monotone type mappings. (English) Zbl 1208.34098 Appl. Math. Lett. 23, No. 11, 1320-1325 (2010). Reviewer: Daniel C. Biles (Nashville) MSC: 34G25 34C25 34B15 PDFBibTeX XMLCite \textit{Y. Chen} et al., Appl. Math. Lett. 23, No. 11, 1320--1325 (2010; Zbl 1208.34098) Full Text: DOI
Chen, Jinhai; O’Regan, Donal On a perturbed conservative system of semilinear wave equations with periodic-Dirichlet boundary conditions. (English) Zbl 1186.35008 Bull. Aust. Math. Soc. 81, No. 2, 281-288 (2010). MSC: 35B10 35L71 35L20 35P05 47F05 PDFBibTeX XMLCite \textit{J. Chen} and \textit{D. O'Regan}, Bull. Aust. Math. Soc. 81, No. 2, 281--288 (2010; Zbl 1186.35008) Full Text: DOI
Agarwal, Ravi P.; Chen, Jinhai; O’Regan, Donal Periodic solutions for a resonant system of coupled telegraph-wave equations. (English) Zbl 1198.35145 Dyn. Contin. Discrete Impuls. Syst., Ser. B, Appl. Algorithms 15, No. 6, 891-902 (2008). MSC: 35L53 35B10 35B34 35L71 35D30 PDFBibTeX XMLCite \textit{R. P. Agarwal} et al., Dyn. Contin. Discrete Impuls. Syst., Ser. B, Appl. Algorithms 15, No. 6, 891--902 (2008; Zbl 1198.35145)
Chu, Jifeng; Chen, Hao; O’Regan, Donal Positive periodic solutions and eigenvalue intervals for systems of second order differential equations. (English) Zbl 1161.34013 Math. Nachr. 281, No. 11, 1549-1556 (2008). Reviewer: Satoshi Tanaka (Okayama) MSC: 34B18 34B15 34L15 47N20 PDFBibTeX XMLCite \textit{J. Chu} et al., Math. Nachr. 281, No. 11, 1549--1556 (2008; Zbl 1161.34013) Full Text: DOI
Chen, Jinhai; O’Regan, Donal; Tisdell, Christopher C. Some results on periodic solutions for even order differential equations. (English) Zbl 1168.34324 Commun. Appl. Anal. 12, No. 1, 23-28 (2008). Reviewer: Zaihong Wang (Beijing) MSC: 34C25 34B15 PDFBibTeX XMLCite \textit{J. Chen} et al., Commun. Appl. Anal. 12, No. 1, 23--28 (2008; Zbl 1168.34324)
Agarwal, R. P.; O’Regan, D.; Papageorgiou, N. S. On the existence of two nontrivial solutions of periodic problems with operators of \(p\)-Laplacian type. (English. Russian original) Zbl 1131.34014 Differ. Equ. 43, No. 2, 157-163 (2007); translation from Differ. Uravn. 43, No. 2, 154-160 (2007). Reviewer: Irena Rachůnková (Olomouc) MSC: 34B15 PDFBibTeX XMLCite \textit{R. P. Agarwal} et al., Differ. Equ. 43, No. 2, 157--163 (2007; Zbl 1131.34014); translation from Differ. Uravn. 43, No. 2, 154--160 (2007) Full Text: DOI
O’Regan, Donal; Zima, Mirosława Leggett–Williams norm-type theorems for coincidences. (English) Zbl 1109.47051 Arch. Math. 87, No. 3, 233-244 (2006). Reviewer: Peter Zabreiko (Minsk) MSC: 47J05 47H07 47H09 34B18 34C25 PDFBibTeX XMLCite \textit{D. O'Regan} and \textit{M. Zima}, Arch. Math. 87, No. 3, 233--244 (2006; Zbl 1109.47051) Full Text: DOI
O’Regan, Donal; Wang, Haiyan Positive periodic solutions of systems of second order ordinary differential equations. (English) Zbl 1103.34027 Positivity 10, No. 2, 285-298 (2006). Reviewer: Pedro J. Torres (Granada) MSC: 34C25 34B15 PDFBibTeX XMLCite \textit{D. O'Regan} and \textit{H. Wang}, Positivity 10, No. 2, 285--298 (2006; Zbl 1103.34027) Full Text: DOI
Zuo, Wenjie; Jiang, Daqing; O’Regan, Donal; Agarwal, R. P. A monotone method for fourth order periodic boundary value problems and periodic solutions of functional differential equations. (English) Zbl 1133.34034 Methods Appl. Anal. 12, No. 1, 19-27 (2005). Reviewer: Klaus R. Schneider (Berlin) MSC: 34K10 34K13 34K07 PDFBibTeX XMLCite \textit{W. Zuo} et al., Methods Appl. Anal. 12, No. 1, 19--27 (2005; Zbl 1133.34034) Full Text: DOI
Lü, Haishen; O’Regan, Donal; Agarwal, Ravi P. On the existence of multiple periodic solutions for the vector \(p\)-Laplacian via critical point theory. (English) Zbl 1099.34021 Appl. Math., Praha 50, No. 6, 555-568 (2005). MSC: 34B15 PDFBibTeX XMLCite \textit{H. Lü} et al., Appl. Math., Praha 50, No. 6, 555--568 (2005; Zbl 1099.34021) Full Text: DOI EuDML
Lin, Xiaoning; Jiang, Daqing; O’Regan, Donal; Agarwal, Ravi P. Twin positive periodic solutions of second order singular differential systems. (English) Zbl 1098.34032 Topol. Methods Nonlinear Anal. 25, No. 2, 263-273 (2005). Reviewer: Pierpaolo Omari (Trieste) MSC: 34C25 34B15 34B18 34B16 47H10 PDFBibTeX XMLCite \textit{X. Lin} et al., Topol. Methods Nonlinear Anal. 25, No. 2, 263--273 (2005; Zbl 1098.34032) Full Text: DOI
Zuo, Wenjie; Jiang, Daqing; O’Regan, Donal; Agarwal, R. P. Optimal existence conditions for the periodic delay \(\phi\)-Laplace equation with upper and lower solutions in the reverse order. (English) Zbl 1059.34049 Result. Math. 44, No. 3-4, 375-385 (2003). Reviewer: Jurang Yan (Taiyuan) MSC: 34K13 34K10 PDFBibTeX XMLCite \textit{W. Zuo} et al., Result. Math. 44, No. 3--4, 375--385 (2003; Zbl 1059.34049) Full Text: DOI
Jiang, Daqing; Chu, Jifeng; O’Regan, Donal; Agarwal, Ravi P. Multiple positive solutions to superlinear periodic boundary value problems with repulsive singular forces. (English) Zbl 1042.34047 J. Math. Anal. Appl. 286, No. 2, 563-576 (2003). Reviewer: Alessandro Fonda (Trieste) MSC: 34B18 PDFBibTeX XMLCite \textit{D. Jiang} et al., J. Math. Anal. Appl. 286, No. 2, 563--576 (2003; Zbl 1042.34047) Full Text: DOI
Agarwal, Ravi P.; O’Regan, Donal Infinite interval problems for differential, difference and integral equations. (English) Zbl 0988.34002 Dordrecht: Kluwer Academic Publishers. x, 341 p. (2001). Reviewer: Yuri V.Rogovchenko (Famagusta) MSC: 34-02 34G25 45-02 34Bxx 39A12 34C25 34C27 PDFBibTeX XMLCite \textit{R. P. Agarwal} and \textit{D. O'Regan}, Infinite interval problems for differential, difference and integral equations. Dordrecht: Kluwer Academic Publishers (2001; Zbl 0988.34002)
Frigon, M.; O’Regan, D. First order impulsive initial and periodic problems with variable moments. (English) Zbl 0930.34016 J. Math. Anal. Appl. 233, No. 2, 730-739 (1999). Reviewer: Stepan Kostadinov (Plovdiv) MSC: 34B37 PDFBibTeX XMLCite \textit{M. Frigon} and \textit{D. O'Regan}, J. Math. Anal. Appl. 233, No. 2, 730--739 (1999; Zbl 0930.34016) Full Text: DOI
O’Regan, D. Landesman-Lazer-type results for first order periodic problems. (English) Zbl 0893.34012 Commentat. Math. Univ. Carol. 38, No. 2, 297-308 (1997). Reviewer: J.Kalas (Brno) MSC: 34B15 34-02 PDFBibTeX XMLCite \textit{D. O'Regan}, Commentat. Math. Univ. Carol. 38, No. 2, 297--308 (1997; Zbl 0893.34012) Full Text: EuDML
O’Regan, Donal Carathéodory theory of nonresonant second order boundary value problems. (English) Zbl 0870.34028 Differ. Equ. Dyn. Syst. 4, No. 1, 57-77 (1996). Reviewer: R.Precup (Cluj-Napoca) MSC: 34B15 PDFBibTeX XMLCite \textit{D. O'Regan}, Differ. Equ. Dyn. Syst. 4, No. 1, 57--77 (1996; Zbl 0870.34028)
O’Regan, Donal Solvability of some second-order boundary value problems using eigenvalues of Sturm-Liouville problems. (English) Zbl 0853.34024 Proc. R. Ir. Acad., Sect. A 95, No. 2, 153-172 (1995). Reviewer: W.Šeda (Bratislava) MSC: 34B15 PDFBibTeX XMLCite \textit{D. O'Regan}, Proc. R. Ir. Acad., Sect. A 95, No. 2, 153--172 (1995; Zbl 0853.34024)
O’Regan, Donal Existence principles for second order nonresonant boundary value problems. (English) Zbl 0819.34019 J. Appl. Math. Stochastic Anal. 7, No. 4, 487-507 (1994). Reviewer: W.Šeda (Bratislava) MSC: 34B15 34B24 34B27 PDFBibTeX XMLCite \textit{D. O'Regan}, J. Appl. Math. Stochastic Anal. 7, No. 4, 487--507 (1994; Zbl 0819.34019) Full Text: DOI EuDML
O’Regan, Donal Solvability of some two-point boundary value problems of Dirichlet, Neumann or periodic type. (English) Zbl 0785.34025 Dyn. Syst. Appl. 2, No. 2, 163-182 (1993). Reviewer: R.Precup (Cluj-Napoca) MSC: 34B15 PDFBibTeX XMLCite \textit{D. O'Regan}, Dyn. Syst. Appl. 2, No. 2, 163--182 (1993; Zbl 0785.34025)