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A functional equation characterizing the second derivative |
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| Authors: | Hermann König Vitali Milman |
| Institution: | a Mathematisches Seminar, Universität Kiel, 24098 Kiel, Germany b School of Mathematical Sciences, Tel Aviv University, Ramat Aviv, Tel Aviv 69978, Israel |
| Abstract: | Consider an operator T:C2(R)→C(R) and isotropic maps A1,A2:C1(R)→C(R) such that the functional equation |
| Keywords: | Chain rule Second derivative Localization |
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