Abstract
A theorem on the zero existence preservation for a parametric family of multivalued (α, β)-search functionals on an open subset of a metric space is proved. Several corollaries on the existence preservation for preimages of a closed subspace, for coincidence points, and for common fixed points under the action of a parametric family (a number of families) of mappings are obtained. The notion of a Zamfirescu-type pair of mappings is introduced, and a coincidence theorem for such pairs of mappings is obtained. In addition, a theorem on the coincidence existence preservation for a parametric family of such pairs of mappings is obtained. The obtained results imply several well-known theorems.
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04 May 2021
An Erratum to this paper has been published: https://doi.org/10.1134/S1064562421010087
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This work was performed within the research directions of the Moscow Center of Fundamental and Applied Mathematics.
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Translated by I. Ruzanova
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Fomenko, T.N., Zakharyan, Y.N. Zero Preservation for a Family of Multivalued Functionals, and Applications to the Theory of Fixed Points and Coincidences. Dokl. Math. 102, 272–275 (2020). https://doi.org/10.1134/S1064562420040225
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DOI: https://doi.org/10.1134/S1064562420040225