S. Sessa, B. Fisher, "On common fixed points of weakly commuting mappings and set-valued mappings", International Journal of Mathematics and Mathematical Sciences, vol. 9, Article ID 350126, 7 pages, 1986. https://doi.org/10.1155/S0161171286000406
On common fixed points of weakly commuting mappings and set-valued mappings
Our main theorem establishes the uniqueness of the common fixed point of two set-valued mappings and of two single-valued mappings defined on a complete metric space, under a contractive condition and a weak commutativity concept. This improves a theorem of the second author.
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