DIPS 2/2007 [tex source, PostScript, PDF file, dvi]

Title: Iterated Differential Forms VI: Differential Equations.

Authors: A. M. Vinogradov and L. Vitagliano

We describe the first term of the Λk-1C-spectral sequence (see DIPS 5/06, or math.DG/0610917) of the diffiety (E,C), E being the infinite prolongation of an l-normal system of partial differential equations, and C the Cartan distribution on it.

See also arXiv: math.DG/0703761.

7 pages, LaTeX-2e.

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