Related papers: Perturbation theory for gap solitons

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This paper has been withdrawn by the authors due to a gap in the proof of the main result (in 5.3).

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This paper has been withdrawn by the author. The content of the previous versions is now covered by the more recent papers - math.DG/0610252 (concerning the Lie group structuren on the gauge groups) - math.DG/0612522 (concerning the weak…

This paper has been withdrawn by the corresponding author because the newest version is now published in Journal of Discrete Algorithms.

This paper has been withdrawn by the author(s) in the light of several other works available and due to a misunderstanding in the authorships.

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