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| Analyse des groupes de Lie et algèbres de Lie pour les équations différentielles (1) |
| Analysis of the symmetry Lie group and Lie algebra of differential systems (1) |
| Conditional symmetry method (1) |
| Extrusion dies (1) |
| Filières d’extrusion (1) |
| First-order quasilinear systems (1) |
| Generalized method of characteristics (1) |
| Ideal plasticity (1) |
| Invariant, partially invariant and conditionally invariant solutions (1) |
| Invariants de Riemann (1) |