A partial ordering is defined in metric space. Some fixed point theorems of monotone mappings and coupled fixed point theorems of mixed monotone mappings are peoved.
Xian ZHANG.
Fixed Point Theorems of Monotone Mappings and Coupled Fixed Point Theorems of Mired Monotone Mappings in Ordered Metric Spaces. Acta Mathematica Sinica, Chinese Series, 2001, 44(4): 641-646 https://doi.org/10.12386/A2001sxxb0084