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Reflexivity and sets of Fréchet subdifferentiability |
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| Authors: | Ondrej Kurka |
| Institution: | Department of Mathematical Analysis, Faculty of Mathematics and Physics, Charles University, Sokolovská 83, 186 00 Prague 8, Czech Republic |
| Abstract: | We show that the sets of Fréchet subdifferentiability of Lipschitz functions on a Banach space  are Borel if and only if  is reflexive. This answers a question of L. Zajíček. |
| Keywords: | Reflexivity set of Fr\'echet subdifferentiability Borel set Suslin set |
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