Conservation Laws of Two<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M1"><mml:mrow><mml:mo stretchy="false">(</mml:mo><mml:mo>2</mml:mo><mml:mo>+</mml:mo><mml:mo>1</mml:mo><mml:mo stretchy="false">)</mml:mo></mml:mrow></mml:math>-Dimensional Nonlinear Evolution Equations with Higher-Order Mixed Derivatives
Abstract and applied analysis