Four fixed point theorems for nonlinear set-valued contractive mappings in complete metric spaces are proved. The results presented in this paper are extensions of a few well-known fixed point theorems. Two examples are also provided to illustrate our results.
Zeqing Liu. Zhihua Wu. Shin Min Kang. Sunhong Lee. "Some Fixed Point Theorems for Nonlinear Set-Valued Contractive Mappings." J. Appl. Math. 2012 (SI03) 1 - 13, 2012. https://doi.org/10.1155/2012/786061