Semnan University International Journal of Nonlinear Analysis and Applications 2008-6822 2 1 2011 01 01 Common fixed points of four maps using generalized weak contractivity and well-posedness 73 81 103 10.22075/ijnaa.2011.103 EN M. Akkouchi Department of Mathematics, Faculty of Sciences-Semlalia, University Cadi Ayyad, Av. Prince My. Abdellah, P. O. Box, 2390, Marrakech, Morocco (Maroc). Journal Article 2010 06 12 In this paper, we introduce the concept of generalized $\phi$-contractivity of a pair of maps w.r.t. another pair. We establish a common fixed point result for two pairs of self-mappings, when one of these pairs is generalized $\phi$-contraction w.r.t. the other and study the well-posedness of their fixed point problem. In particular, our fixed point result extends the main result of a recent paper by Qingnian Zhang and Yisheng Song. Common fixed point for four mappings generalized $phi$−contractions lower semi-continuity weakly compatible mappings well-posed common fixed point problem https://ijnaa.semnan.ac.ir/article_103_2299dbac30d9a74ab14d318fae8317c9.pdf