The Construction of the mKdV Cyclic Symmetric $N$-soliton Solution by the B{a}cklund Transformation


الملخص بالإنكليزية

We study group theoretical structures of the mKdV equation. The Schwarzian type mKdV equation has the global M{o}bius group symmetry. The Miura transformation makes a connection between the mKdV equation and the KdV equation. We find the special local M{o}bius transformation on the mKdV one-soliton solution which can be regarded as the commutative KdV B{a}cklund transformation can generate the mKdV cyclic symmetric $N$-soliton solution. In this algebraic construction to obtain multi-soliton solutions, we could observe the addition formula.

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