carpathian_2020_36_2_295_302_abstractLet 
be a metric space, 
be a nonempty closed subset and 
be a nonempty compact subset. By definition, a continuous operator 
is said to be a Frum-Ketkov operator if there exists ![l\in ]0,1[](https://www.carpathian.cunbm.utcluj.ro/wp-content/ql-cache/quicklatex.com-9030afc749539dd6e6f66b38dd4adea5_l3.png "Rendered by QuickLaTeX.com")
such that 
, for every 
. In this paper, we will give sufficient conditions ensuring that a Frum-Ketkov operator is weakly Picard. Some generalized Frum-Ketkov operators are also studied.
| Author(s) | Şerban, Marcel-Adrian, Petrușel, Adrian, Rus, Ioan A. |
|---|
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