Abstract
We present some necessary and some sufficient conditions for a family of multifunctions generated by two families of real functions to be a collapsing, an expanding family or an iteration semigroup. Some properties of set-valued iteration groups generated by commuting homeomorphisms not embeddable in an iteration group are given.
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Olko, J. On indexed families of multifunctions generated by families of functions. Aequat. Math. 88, 125–135 (2014). https://doi.org/10.1007/s00010-013-0239-1
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DOI: https://doi.org/10.1007/s00010-013-0239-1