Ask a Question

Prefer a chat interface with context about you and your work?

Existence of Solutions for Some Nonlinear Elliptic Anisotropic Unilateral Problems with Lower Order Terms

Existence of Solutions for Some Nonlinear Elliptic Anisotropic Unilateral Problems with Lower Order Terms

Abstract In this paper, we prove the existence of entropy solutions for anisotropic elliptic unilateral problem associated to the equations of the form <m:math xmlns:m="http://www.w3.org/1998/Math/MathML"><m:mrow><m:mo>-</m:mo><m:munderover><m:mo>โˆ‘</m:mo><m:mrow><m:mi>i</m:mi><m:mo>=</m:mo><m:mn>1</m:mn></m:mrow><m:mi>N</m:mi></m:munderover><m:mrow><m:msub><m:mrow><m:mo>โˆ‚</m:mo></m:mrow><m:mi>i</m:mi></m:msub><m:msub><m:mrow><m:mi>a</m:mi></m:mrow><m:mi>i</m:mi></m:msub><m:mo>(</m:mo><m:mi>x</m:mi><m:mo>,</m:mo><m:mi>u</m:mi><m:mo>,</m:mo><m:mo>โˆ‡</m:mo><m:mi>u</m:mi><m:mo>)</m:mo><m:mo>-</m:mo></m:mrow><m:munderover><m:mo>โˆ‘</m:mo><m:mrow><m:mi>i</m:mi><m:mo>=</m:mo><m:mn>1</m:mn></m:mrow><m:mi>N</m:mi></m:munderover><m:mrow><m:msub><m:mrow><m:mo>โˆ‚</m:mo></m:mrow><m:mi>i</m:mi></m:msub><m:msub><m:mrow><m:mi>ฯ†</m:mi></m:mrow><m:mi>i</m:mi></m:msub><m:mo>(</m:mo><m:mi>u</m:mi><m:mo>)</m:mo><m:mo>=</m:mo><m:mi>f</m:mi><m:mo>,</m:mo></m:mrow></m:mrow></m:math> $$ - \sum\limits_{i = 1}^N {{\partial _i}{a_i}(x,u,\nabla u) - } \sum\limits_{i = 1}^N {{\partial _i}{\phi _i}(u) = f,} $$ where the right hand side f โ€ฆ