Abstract
Let $A(x)$, $B(x)$, $C(x)$ be characteristic functions of three measurable sets of real numbers. We determine necessary and sufficient conditions for which $A(x+a_{n})+B(x+b_{n})+C(x+c_{n})=A(x)+B(x)+C(x)$ almost everywhere, where $\{ a_n\},\{ b_n\},\{ c_n\}$ are sequences of nonzero shifts approaching zero.
Citation
H. Fast. H. Fejzić. C. Freiling. D. Rinne. "Recursive set relations.." Real Anal. Exchange 29 (2) 835 - 851, 2003-2004.
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