Appell, Jürgen; Dutkiewicz, Aldona; López, Belén; Reinwand, Simon; Sadarangani, Kishin Hölder-type spaces, singular operators, and fixed point theorems. (English) Zbl 1523.47080 Fixed Point Theory 22, No. 1, 31-58 (2021). Reviewer: Jürgen Appell (Würzburg) MSC: 47N20 26A33 47H10 47J05 26A15 26A16 34B16 45D05 45E05 45G05 47H30 PDFBibTeX XMLCite \textit{J. Appell} et al., Fixed Point Theory 22, No. 1, 31--58 (2021; Zbl 1523.47080) Full Text: Link
Appell, Jürgen; Guanda, Nathaly; Väth, Martin Function spaces with the Matkowski property and degeneracy phenomena for composition operators. (English) Zbl 1253.47038 Fixed Point Theory 12, No. 2, 265-284 (2011). Reviewer: Andrzej Smajdor (Kraków) MSC: 47H30 26A16 26A45 26A46 PDFBibTeX XMLCite \textit{J. Appell} et al., Fixed Point Theory 12, No. 2, 265--284 (2011; Zbl 1253.47038) Full Text: Link
Appell, J.; Kalitvin, A. S. Existence results for integral equations: spectral methods vs.fixed point theory. (English) Zbl 1118.47056 Fixed Point Theory 7, No. 2, 219-234 (2006). Reviewer: In-Sook Kim (München) MSC: 47N20 45G10 47H30 47J25 47J10 47H10 PDFBibTeX XMLCite \textit{J. Appell} and \textit{A. S. Kalitvin}, Fixed Point Theory 7, No. 2, 219--234 (2006; Zbl 1118.47056)
Appell, J. Measures of noncompactness, condensing operators and fixed points: an application-oriented survey. (English) Zbl 1102.47041 Fixed Point Theory 6, No. 2, 157-229 (2005). MSC: 47H10 47H09 34A34 34K40 35J65 45G05 45P05 46E15 46E30 46E35 47H30 47-02 47N20 PDFBibTeX XMLCite \textit{J. Appell}, Fixed Point Theory 6, No. 2, 157--229 (2005; Zbl 1102.47041)