ABSTRACT The concept of normal form is used to study the dynamics of non-linear systems. In this work we describe the normal form for vector fields on 3 × 3 with linear nilpotent part made up of coupled R3n Jordan blocks. We use an algorithm based on the notion of transvectants from classical invariant theory known as boosting to equivariants in determining the normal form when the Stanley decomposition for the ring of invariants is known.
Cite this paper
G. Gachigua, D. Malonza and J. Sigey, "Normal Form for Systems with Linear Part N3(n)," Applied Mathematics, Vol. 3 No. 11, 2012, pp. 1641-1647. doi: 10.4236/am.2012.311227.
 R. Cushman, J. A. Sanders and N. White, “Normal Form for the (2;n)-Nilpotent Vector Field Using Invariant Theory,” Physica D: Nonlinear Phenomena, Vol. 30, No. 3, 1988, pp. 399-412. doi:10.1016/0167-2789(88)90028-0
 D. M. Malonza “Normal Forms for Coupled Takens-Bogdanov Systems,” Journal of Nonlinear Mathematical Physics, Vol. 11, No. 3, 2004, pp. 376-398.
 W. W. Adams and P. Loustaunau, “An Introduction to Gr?bner Bases,” American Mathematical Society, Providence, 1994.
 J. Murdock and J. A. Sanders, “A New Transvectant Algorithm for Nilpotent Normal Forms,” Journal of Differential Equations, Vol. 238, No. 1, 2007, pp. 234-256.
 N. Sri NAmachchivaya, M. M. Doyle, W. F. Langford and N. W. Evans, “Normal Form for Generalized Hopf Bifurcation with Non-Semisimple 1:1 Resonance,” Zeitschrift für Angewandte Mathematik und Physik (ZAMP), Vol. 45, No. 2, 1994, pp. 312-335.
 G. Gachigua and D. Malonza, “Stanley Decomposition of Coupled N333 System,” Proceedings of the 1st Kenyatta University International Mathematics Conference, Nairobi, 6-10 June 2011, pp. 39-52.