Abstract
We introduce affine and convex functions with a control function and present some sandwich type theorems for them. Also, Hyers–Ulam stability type results for affine and convex functions with a control function are given.
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Adamek, M. On a generalization of sandwich type theorems. Aequat. Math. 92, 641–647 (2018). https://doi.org/10.1007/s00010-018-0553-8
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DOI: https://doi.org/10.1007/s00010-018-0553-8