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Real Anal. Exch. 32(2006-2007), No. 2, 563-568 (2007).

Summary: We show that every set of reals is a set of points of weak symmetry for some function \(f\colon\mathbb{R}\to\mathbb{N}\).

26A15	Continuity and related questions (modulus of continuity, semicontinuity, discontinuities, etc.) for real functions in one variable
26A03	Foundations: limits and generalizations, elementary topology of the line

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