Soliton and Breather Solutions for the Mixed Nonlinear Schrödinger Equation via<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M1"><mml:mrow><mml:mi>N</mml:mi></mml:mrow></mml:math>-Fold Darboux Transformation
Journal of applied mathematics