El Mokhtar, Mohammed E. O2013-02-212013-02-212012https://dspace.univ-tlemcen.dz/handle/112/1456In this article, we establish the existence of at least four solutions to a singular system with a concave term, a critical Caffarelli-Kohn-Nirenberg exponent, and sign-changing weight functions. Our main tools are the Nehari manifold and the mountain pass theorem.enSingular elliptic systemconcave termmountain pass theoremcritical Caffarelli-Kohn-Nirenberg exponentNehari manifoldsign-changing weight functionArticle