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On the second differentiability of convex surfaces |
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| Authors: | Gabriele Bianchi Andrea Colesanti Carlo Pucci |
| Institution: | (1) Dipartimento di Matematica, Universitá di Ferrara, Via Machiavelli 35, 44100 Ferrara, Italy;(2) Istituto di Analisi Globale e Applicazioni del CNR, Via S. Marta 13/a, 50139 Firenze, Italy |
| Abstract: | Properties of pointwise second differentiability of real-valued convex functions in 
n
are studied. Some proofs of the Busemann-Feller-Aleksandrov theorem are reviewed and a new proof of this theorem is presented. |
| Keywords: | 26B05 52A20 |
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