Sokhadze, Z. Weighted Cauchy problem for differential equations with deviating arguments. (English. Russian original) Zbl 1354.34117 J. Math. Sci., New York 218, No. 6, 834-838 (2016); translation from Sovrem. Mat. Prilozh. 97 (2015). MSC: 34K05 PDF BibTeX XML Cite \textit{Z. Sokhadze}, J. Math. Sci., New York 218, No. 6, 834--838 (2016; Zbl 1354.34117); translation from Sovrem. Mat. Prilozh. 97 (2015) Full Text: DOI OpenURL
Kelevedjiev, Petio; Popivanov, Nedyu Second-order initial value problems with singularities. (English) Zbl 1311.34025 Bound. Value Probl. 2014, Paper No. 161, 15 p. (2014). MSC: 34A12 34D05 PDF BibTeX XML Cite \textit{P. Kelevedjiev} and \textit{N. Popivanov}, Bound. Value Probl. 2014, Paper No. 161, 15 p. (2014; Zbl 1311.34025) Full Text: DOI OpenURL
Půža, B.; Sokhadze, Z. Weighted Cauchy problem for nonlinear singular differential equations with deviating arguments. (English) Zbl 1273.34071 Differ. Equ. 49, No. 1, 32-44 (2013); translation from Differ. Uravn. 49, No. 1, 33-45 (2013). MSC: 34K05 PDF BibTeX XML Cite \textit{B. Půža} and \textit{Z. Sokhadze}, Differ. Equ. 49, No. 1, 32--44 (2013; Zbl 1273.34071); translation from Differ. Uravn. 49, No. 1, 33--45 (2013) Full Text: DOI OpenURL
Kelevedjiev, P. S.; Tersian, S. Singular and nonsingular first-order initial value problems. (English) Zbl 1191.34010 J. Math. Anal. Appl. 366, No. 2, 516-524 (2010). MSC: 34A12 PDF BibTeX XML Cite \textit{P. S. Kelevedjiev} and \textit{S. Tersian}, J. Math. Anal. Appl. 366, No. 2, 516--524 (2010; Zbl 1191.34010) Full Text: DOI OpenURL
Agarwal, R. P.; Kelevedjiev, P. S.; O’Regan, D. Barrier strips and positive solutions of first order singular and regular initial value problems. (English. Russian original) Zbl 1185.34009 Differ. Equ. 45, No. 10, 1408-1413 (2009); translation from Differ. Uravn. 45, No. 10, 1378-1382 (2009). Reviewer: Johannes Schropp (Konstanz) MSC: 34A09 PDF BibTeX XML Cite \textit{R. P. Agarwal} et al., Differ. Equ. 45, No. 10, 1408--1413 (2009; Zbl 1185.34009); translation from Differ. Uravn. 45, No. 10, 1378--1382 (2009) Full Text: DOI OpenURL
Agarwal, R. P.; Kelevedjiev, P. S. Existence of solutions to a singular initial value problem. (English) Zbl 1135.34004 Acta Math. Sin., Engl. Ser. 23, No. 10, 1797-1806 (2007). Reviewer: Narahari Parhi (Bhubaneswar) MSC: 34A12 PDF BibTeX XML Cite \textit{R. P. Agarwal} and \textit{P. S. Kelevedjiev}, Acta Math. Sin., Engl. Ser. 23, No. 10, 1797--1806 (2007; Zbl 1135.34004) Full Text: DOI OpenURL
Li, Jianli; Shen, Jianhua Existence of positive solution to a singular second-order initial value problem with impulses. (English) Zbl 1123.34005 J. Comput. Appl. Math. 206, No. 2, 699-712 (2007). Reviewer: Seenith Sivasundaram (Daytona Beach) MSC: 34A37 34A12 PDF BibTeX XML Cite \textit{J. Li} and \textit{J. Shen}, J. Comput. Appl. Math. 206, No. 2, 699--712 (2007; Zbl 1123.34005) Full Text: DOI OpenURL
Kelevedjiev, P. S.; O’Regan, D.; Seman, J. Existence of solutions to an initial value problem for the differential equation \(f(t,x,x^{\prime})=0\) using barrier strips. (English) Zbl 1125.34300 Nonlinear Anal., Theory Methods Appl., Ser. A, Theory Methods 67, No. 5, 1504-1512 (2007). Reviewer: Georgii P. Razmyslovich (Minsk) MSC: 34A09 34A12 PDF BibTeX XML Cite \textit{P. S. Kelevedjiev} et al., Nonlinear Anal., Theory Methods Appl., Ser. A, Theory Methods 67, No. 5, 1504--1512 (2007; Zbl 1125.34300) Full Text: DOI OpenURL
Kelevedjiev, P. S.; O’Regan, Donal On the solvability of a singular initial value problem \(x^{\prime}=f(t,x,x^{\prime})\) using barrier strips. (English) Zbl 1101.34002 Nonlinear Anal., Theory Methods Appl., Ser. A, Theory Methods 64, No. 4, 726-738 (2006). Reviewer: Tihomir Gyulov (Rousse) MSC: 34A12 34A09 PDF BibTeX XML Cite \textit{P. S. Kelevedjiev} and \textit{D. O'Regan}, Nonlinear Anal., Theory Methods Appl., Ser. A, Theory Methods 64, No. 4, 726--738 (2006; Zbl 1101.34002) Full Text: DOI OpenURL
Agarwal, R. P.; O’Regan, D.; Lakshmikantham, V.; Leela, S. A generalized upper and lower solution method for singular initial value problems. (English) Zbl 1098.34004 Comput. Math. Appl. 47, No. 4-5, 739-750 (2004). Reviewer: Klaus R. Schneider (Berlin) MSC: 34A12 PDF BibTeX XML Cite \textit{R. P. Agarwal} et al., Comput. Math. Appl. 47, No. 4--5, 739--750 (2004; Zbl 1098.34004) Full Text: DOI OpenURL
Kelevedjiev, P.; Seman, J. Existence of solutions to initial value problems for first-order differential equations. (English) Zbl 1058.34001 Nonlinear Anal., Theory Methods Appl., Ser. A, Theory Methods 57, No. 7-8, 879-889 (2004). Reviewer: Nicholas Karampetakis (Thessaloniki) MSC: 34A09 34A12 PDF BibTeX XML Cite \textit{P. Kelevedjiev} and \textit{J. Seman}, Nonlinear Anal., Theory Methods Appl., Ser. A, Theory Methods 57, No. 7--8, 879--889 (2004; Zbl 1058.34001) Full Text: DOI OpenURL
Agarwal, R. P.; O’Regan, Donal; Lakshmikantham, V.; Leela, S. Existence of positive solutions for singular initial and boundary value problems via the classical upper and lower solution approach. (English) Zbl 1010.34011 Nonlinear Anal., Theory Methods Appl., Ser. A, Theory Methods 50, No. 2, 215-222 (2002). Reviewer: Mo Jiaqi (Anhui) MSC: 34B15 34B16 PDF BibTeX XML Cite \textit{R. P. Agarwal} et al., Nonlinear Anal., Theory Methods Appl., Ser. A, Theory Methods 50, No. 2, 215--222 (2002; Zbl 1010.34011) Full Text: DOI OpenURL
Agarwal, Ravi P.; O’Regan, Donal A note on upper and lower solutions for singular initial value problems. (English) Zbl 0982.34006 Math. Methods Appl. Sci. 24, No. 1, 49-57 (2001). Reviewer: Alberto Cabada (Santiago de Compostela) MSC: 34A12 34A45 PDF BibTeX XML Cite \textit{R. P. Agarwal} and \textit{D. O'Regan}, Math. Methods Appl. Sci. 24, No. 1, 49--57 (2001; Zbl 0982.34006) Full Text: DOI OpenURL
Agarwal, Ravi P.; O’Regan, Donal Second-order initial value problems of singular type. (English) Zbl 0920.34003 J. Math. Anal. Appl. 229, No. 2, 441-451 (1999). Reviewer: J.Banaś (Rzeszów) MSC: 34A12 PDF BibTeX XML Cite \textit{R. P. Agarwal} and \textit{D. O'Regan}, J. Math. Anal. Appl. 229, No. 2, 441--451 (1999; Zbl 0920.34003) Full Text: DOI OpenURL
Agarwal, R. P.; O’Regan, D. Positive solutions to singular initial value problems with sign changing nonlinearities. (English) Zbl 1098.34500 Math. Comput. Modelling 28, No. 3, 31-39 (1998). MSC: 34A12 PDF BibTeX XML Cite \textit{R. P. Agarwal} and \textit{D. O'Regan}, Math. Comput. Modelling 28, No. 3, 31--39 (1998; Zbl 1098.34500) Full Text: DOI OpenURL
Xia, Huaxing; Spanily, Tadeusz Global existence problem for singular functional differential equations. (English) Zbl 0777.34046 Nonlinear Anal., Theory Methods Appl. 20, No. 8, 921-934 (1993). Reviewer: M.M.Konstantinov (Sofia) MSC: 34K05 34A12 PDF BibTeX XML Cite \textit{H. Xia} and \textit{T. Spanily}, Nonlinear Anal., Theory Methods Appl. 20, No. 8, 921--934 (1993; Zbl 0777.34046) Full Text: DOI OpenURL
O’Regan, Donal Existence of solutions to some differential delay equations. (English) Zbl 0849.34050 Nonlinear Anal., Theory Methods Appl. 20, No. 2, 79-95 (1993). Reviewer: P.Ch.Tsamatos (MR 93m:34099) MSC: 34K05 34K10 PDF BibTeX XML Cite \textit{D. O'Regan}, Nonlinear Anal., Theory Methods Appl. 20, No. 2, 79--95 (1993; Zbl 0849.34050) Full Text: DOI OpenURL
O’Regan, Donal Solvability of some fourth (and higher) order singular boundary value problems. (English) Zbl 0795.34018 J. Math. Anal. Appl. 161, No. 1, 78-116 (1991). MSC: 34B15 PDF BibTeX XML Cite \textit{D. O'Regan}, J. Math. Anal. Appl. 161, No. 1, 78--116 (1991; Zbl 0795.34018) Full Text: DOI OpenURL
Bobisud, L. E.; Lee, Y. S. Existence of monotone or positive solutions of singular second-order sublinear differential equations. (English) Zbl 0733.34027 J. Math. Anal. Appl. 159, No. 2, 449-468 (1991). Reviewer: Charles A.Swanson (Vancouver) MSC: 34B15 34C11 34C99 PDF BibTeX XML Cite \textit{L. E. Bobisud} and \textit{Y. S. Lee}, J. Math. Anal. Appl. 159, No. 2, 449--468 (1991; Zbl 0733.34027) Full Text: DOI OpenURL
O’Regan, Donal Singular second order boundary value problems. (English) Zbl 0732.34021 Nonlinear Anal., Theory Methods Appl. 15, No. 12, 1097-1109 (1990). Reviewer: B.Shekhter (Tbilisi) MSC: 34B15 PDF BibTeX XML Cite \textit{D. O'Regan}, Nonlinear Anal., Theory Methods Appl. 15, No. 12, 1097--1109 (1990; Zbl 0732.34021) Full Text: DOI OpenURL
O’Regan, Donal Fourth (and higher) order singular boundary value problems. (English) Zbl 0711.34026 Nonlinear Anal., Theory Methods Appl. 14, No. 12, 1001-1038 (1990). Reviewer: A.Boucherif MSC: 34B15 PDF BibTeX XML Cite \textit{D. O'Regan}, Nonlinear Anal., Theory Methods Appl. 14, No. 12, 1001--1038 (1990; Zbl 0711.34026) Full Text: DOI OpenURL
O’Regan, Donal Some new results for second order boundary value problems. (English) Zbl 0711.34025 J. Math. Anal. Appl. 148, No. 2, 548-570 (1990). Reviewer: A.Boucherif MSC: 34B15 PDF BibTeX XML Cite \textit{D. O'Regan}, J. Math. Anal. Appl. 148, No. 2, 548--570 (1990; Zbl 0711.34025) Full Text: DOI OpenURL
O’Regan, D. Existence of positive solutions to some singular and nonsingular second order boundary value problems. (English) Zbl 0706.34030 J. Differ. Equations 84, No. 2, 228-251 (1990). Reviewer: Huang Qiyu MSC: 34C11 PDF BibTeX XML Cite \textit{D. O'Regan}, J. Differ. Equations 84, No. 2, 228--251 (1990; Zbl 0706.34030) Full Text: DOI OpenURL
Bobisud, L. E. Existence of solutions for nonlinear singular boundary value problems. (English) Zbl 0666.34017 Appl. Anal. 35, No. 1-4, 43-57 (1990). Reviewer: L.E.Bobisud MSC: 34B15 PDF BibTeX XML Cite \textit{L. E. Bobisud}, Appl. Anal. 35, No. 1--4, 43--57 (1990; Zbl 0666.34017) Full Text: DOI OpenURL
O’Regan, D. Positive solutions to singular and non-singular second-order boundary value problems. (English) Zbl 0689.34015 J. Math. Anal. Appl. 142, No. 1, 40-52 (1989). MSC: 34B05 34C11 PDF BibTeX XML Cite \textit{D. O'Regan}, J. Math. Anal. Appl. 142, No. 1, 40--52 (1989; Zbl 0689.34015) Full Text: DOI OpenURL