Let $f$ be a regular $2\pi-$periodic function .
How to find the functions that solve this inequality $a \le f+f^{'}+f^{"} \le b$ where $a,b \in \mathbb{R}_{+}$ .
Could you give me some books to deal with this type of problem? Thanks
2026-03-28 13:42:17.1774705337
How To solve this type of inequation
51 Views Asked by Bumbble Comm https://math.techqa.club/user/bumbble-comm/detail AtRelated Questions in REAL-ANALYSIS
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