Geodesic
Remarks on the quasiconvex envelope of some functions depending on quadratic forms
Bollettino della Unione matematica italiana, Série 8, 5B (2002) no. 2, pp. 469-486.

Voir la notice de l'article provenant de la source Biblioteca Digitale Italiana di Matematica

We compute the quasiconvex envelope of certain functions defined on the space $M_{mn}$ of real $m \times n$ matrices. These functions are basically functions of a quadratic form on $M_{mn}$. The quasiconvex envelope computation is applied to densities that are related to the James-Ericksen elastic stored energy function.
In questo lavoro calcoliamo la chiusura quasi convessa di alcune funzioni definite sullo spazio $M_{mn}$ delle matrici reali $m \times n$ attraverso forme quadratiche. I risultati sono applicati ad alcune funzioni relative alla densità di energia elastica di James e Ericksen. 
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Bousselsal, M.; Le Dret, H. Remarks on the quasiconvex envelope of some functions depending on quadratic forms. Bollettino della Unione matematica italiana, Série 8, 5B (2002) no. 2, pp. 469-486. http://geodesic.mathdoc.fr/item/BUMI_2002_8_5B_2_a10/

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