Geodesic
On the equivalence of certain statements on fixed points of contractions
Funkcionalʹnyj analiz i ego priloženiâ, Tome 51 (2017) no. 4, pp. 92-95

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It is shown that a series of recent (2012–2016) generalizations of the notion of contraction $F$-contraction, weak $F$-contraction, etc.) in fact reduce to known notions of contraction (due to Browder, Boyd and Wong, Meir and Keeler, etc.).
Keywords: contractive map, generalized contraction, fixed point, iterations. 
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     author = {P. V. Semenov},
     title = {On the equivalence of certain statements on fixed points of contractions},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {92--95},
     publisher = {mathdoc},
     volume = {51},
     number = {4},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_2017_51_4_a10/}
}
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P. V. Semenov. On the equivalence of certain statements on fixed points of contractions. Funkcionalʹnyj analiz i ego priloženiâ, Tome 51 (2017) no. 4, pp. 92-95. http://geodesic.mathdoc.fr/item/FAA_2017_51_4_a10/