Positive Solutions for a Class of Discrete Mixed Boundary Value Problems with the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M1"><mml:mrow><mml:mfenced open="(" close=")" separators="|"><mml:mrow><mml:mi>p</mml:mi><mml:mo>,</mml:mo><mml:mi>q</mml:mi></mml:mrow></mml:mfenced></mml:mrow></mml:math>-Laplacian Operator
Discrete dynamics in nature and society