  In the present article, we show the existence of a coupled fixed point for an
order preserving mapping in a preordered left K-complete quasi-pseudometric
space using a preorder induced by an appropriate function. We also define the
concept of left-weakly related mappings on a preordered space and discuss
common coupled fixed points for two and three left-weakly related mappings in
the same space. Similar results are given for right-weakly related mappings,
the dual notion of left-weakly related mappings.
