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Abstract: An alternative Lagrangian definition of an integrable defect is provided andanalyzed. The new approach is sufficiently broad to allow a description ofdefects within the Tzitzeica model, which was not possible in previousapproaches, and may be generalizable. New, two-parameter, sine-Gordon defectsare also described, which have characteristics resembling a pair of -fused-defects of a previously considered type. The relationship between these defectsand Backlund transformations is described and a Hamiltonian description ofintegrable defects is proposed.



Author: E. Corrigan, C. Zambon

Source: https://arxiv.org/







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