O’Regan, Donal Maps with weakly sequentially closed graphs satisfying compactness conditions on countable sets. (English) Zbl 1479.47053 Pure Appl. Funct. Anal. 6, No. 2, 367-372 (2021). MSC: 47H10 47H04 PDFBibTeX XMLCite \textit{D. O'Regan}, Pure Appl. Funct. Anal. 6, No. 2, 367--372 (2021; Zbl 1479.47053) Full Text: Link
O’Regan, Donal Essential weakly Mönch type maps and continuation theory. (English) Zbl 1516.54043 Fixed Point Theory 22, No. 2, 779-784 (2021). Reviewer: Radu Precup (Cluj-Napoca) MSC: 54H25 54C60 54C10 55M20 PDFBibTeX XMLCite \textit{D. O'Regan}, Fixed Point Theory 22, No. 2, 779--784 (2021; Zbl 1516.54043) Full Text: Link
O’Regan, Donal Coincidence results for compositions of multivalued maps based on countable compactness principles. (English) Zbl 1460.54051 J. Nonlinear Convex Anal. 21, No. 3, 543-549 (2020). MSC: 54H25 54C60 55M20 PDFBibTeX XMLCite \textit{D. O'Regan}, J. Nonlinear Convex Anal. 21, No. 3, 543--549 (2020; Zbl 1460.54051) Full Text: Link
Ben Amar, Afif; Derbel, Saoussen; O’Regan, Donal; Xiang, Tian Fixed point theory for countably weakly condensing maps and multimaps in non-separable Banach spaces. (English) Zbl 1504.47081 J. Fixed Point Theory Appl. 21, No. 1, Paper No. 8, 25 p. (2019). MSC: 47H10 47H08 47H30 45D05 PDFBibTeX XMLCite \textit{A. Ben Amar} et al., J. Fixed Point Theory Appl. 21, No. 1, Paper No. 8, 25 p. (2019; Zbl 1504.47081) Full Text: DOI
Ali, Amro Alsheikh; Ben Amar, Afif; O’Regan, Donal Fixed point theorems for the sum of two multivalued mappings and an application to an integral inclusion. (English) Zbl 06764043 Bull. Malays. Math. Sci. Soc. (2) 40, No. 3, 1307-1320 (2017). MSC: 47H04 47H10 PDFBibTeX XMLCite \textit{A. A. Ali} et al., Bull. Malays. Math. Sci. Soc. (2) 40, No. 3, 1307--1320 (2017; Zbl 06764043) Full Text: DOI
Cardinali, T.; O’Regan, D.; Rubbioni, P. Mönch sets and fixed point theorems for multimaps in locally convex topological vector spaces. (English) Zbl 1478.47049 Fixed Point Theory 18, No. 1, 147-154 (2017). MSC: 47H10 47H08 47H04 PDFBibTeX XMLCite \textit{T. Cardinali} et al., Fixed Point Theory 18, No. 1, 147--154 (2017; Zbl 1478.47049) Full Text: DOI Link Link
Ben Amar, Afif; Boumaiza, Mohamed; O’Regan, Donal Hybrid fixed point theorems for multivalued mappings in Banach algebras under a weak topology setting. (English) Zbl 1362.47029 J. Fixed Point Theory Appl. 18, No. 2, 327-350 (2016). MSC: 47H04 47H10 PDFBibTeX XMLCite \textit{A. Ben Amar} et al., J. Fixed Point Theory Appl. 18, No. 2, 327--350 (2016; Zbl 1362.47029) Full Text: DOI
O’Regan, Donal Homotopy type results for maps with weakly sequentially closed graphs. (English) Zbl 1318.47070 Dyn. Contin. Discrete Impuls. Syst., Ser. A, Math. Anal. 21, No. 3-4, 355-360 (2014). Reviewer: Dorota Gabor (Toruń) MSC: 47H10 47H04 PDFBibTeX XMLCite \textit{D. O'Regan}, Dyn. Contin. Discrete Impuls. Syst., Ser. A, Math. Anal. 21, No. 3--4, 355--360 (2014; Zbl 1318.47070) Full Text: Link Link
O’Regan, Donal A unified theory for homotopy principles for multimaps. (English) Zbl 1312.54028 Appl. Anal. 92, No. 9, 1944-1958 (2013). Reviewer: Zdzisław Dzedzej (Gdansk) MSC: 54H25 54C60 55M20 54C10 PDFBibTeX XMLCite \textit{D. O'Regan}, Appl. Anal. 92, No. 9, 1944--1958 (2013; Zbl 1312.54028) Full Text: DOI
Agarwal, R. P.; O’Regan, D. Continuation methods for closed, weakly closed, DKT, and WDKT maps. (English) Zbl 0958.47024 Comput. Math. Appl. 38, No. 7-8, 81-88 (1999). Reviewer: G.Hetzer (Auburn) MSC: 47H04 54C60 54C65 PDFBibTeX XMLCite \textit{R. P. Agarwal} and \textit{D. O'Regan}, Comput. Math. Appl. 38, No. 7--8, 81--88 (1999; Zbl 0958.47024) Full Text: DOI
O’Regan, Donal Nonlinear operator approximation theory. (English) Zbl 0911.47044 Numer. Funct. Anal. Optimization 19, No. 5-6, 587-592 (1998). Reviewer: J.Appell (Würzburg) MSC: 47H04 47J05 47H30 PDFBibTeX XMLCite \textit{D. O'Regan}, Numer. Funct. Anal. Optim. 19, No. 5--6, 587--592 (1998; Zbl 0911.47044) Full Text: DOI EuDML