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In this paper, a higher-order (2+1)-dimensional nonlinear Schrödinger-type equation is investigated, which describes the nonlinear spin dynamics of the (2+1)-dimensional Heisenberg ferromagnetic spin chain with bilinear and biquadratic interaction. Lax pair and infinite-number conservation laws are constructed, which could prove the existence of the multi-soliton solutions. Via the auxiliary function,...
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