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.
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