| Title | Polyconvexity equals rank-one convexity for connected isotropic sets in M2×2. |
| Publication Type | Journal Article |
| Year of Publication | 2003 |
| Authors | Conti S., De Lellis C., Müller S., Romeo M. |
| Journal | Comptes Rendus Mathématique. Académie des Sciences. Paris |
| Volume | 337 |
| Pagination | 233–238 |
| Publisher | Elsevier |
| Type of Article | calculus of variations |
| ISSN | 1631-073X |
| Keywords | integral functionals, quasiconvexity, singular values |
| Abstract | We give a short, self-contained argument showing that, for compact connected sets in M2x2 which are invariant under the left and right action of SO(2), polyconvexity is equivalent to rank-one convexity (and even to lamination convexity). As a corollary, the same holds for O(2)-invariant compact sets. These results were first proved by Cardaliaguet and Tahraoui. We also give an example showing that the assumption of connectedness is necessary in the SO(2) case. |
| Notes | C. R. Math. Acad. Sci. Paris 337 (2003), no. 4, 233–238. |
| URL | https://www.sciencedirect.com/science/article/pii/S1631073X03003339 |
| DOI | 10.1016/S1631-073X(03)00333-9 |
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