文摘
This paper is concerned with an elliptic cross-diffusion system describing two-species models on a bounded domain Ω, where Ω consists of a finite number of subdomains ta-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0022247X16000664&_mathId=si1.gif&_user=111111111&_pii=S0022247X16000664&_rdoc=1&_issn=0022247X&md5=206beb35088f05ac8b04a2a1e4b48081" title="Click to view the MathML source">Ωitainer hidden"> (ta-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0022247X16000664&_mathId=si2.gif&_user=111111111&_pii=S0022247X16000664&_rdoc=1&_issn=0022247X&md5=bfd777b2b56588490c817f4b24e49f75" title="Click to view the MathML source">i=1,…,mtainer hidden">) separated by interfaces ta-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0022247X16000664&_mathId=si3.gif&_user=111111111&_pii=S0022247X16000664&_rdoc=1&_issn=0022247X&md5=5580ec7b0721134b355cc94347c67911" title="Click to view the MathML source">Γjtainer hidden"> (ta-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0022247X16000664&_mathId=si4.gif&_user=111111111&_pii=S0022247X16000664&_rdoc=1&_issn=0022247X&md5=6908ed2364bb247ec24d49ae527eb10c" title="Click to view the MathML source">j=1,…,m−1tainer hidden">) and the natural conditions of the subdomains ta-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0022247X16000664&_mathId=si1.gif&_user=111111111&_pii=S0022247X16000664&_rdoc=1&_issn=0022247X&md5=206beb35088f05ac8b04a2a1e4b48081" title="Click to view the MathML source">Ωitainer hidden"> are different. This system is strongly coupled and the coefficients of the equations are allowed to be discontinuous on interfaces ta-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0022247X16000664&_mathId=si3.gif&_user=111111111&_pii=S0022247X16000664&_rdoc=1&_issn=0022247X&md5=5580ec7b0721134b355cc94347c67911" title="Click to view the MathML source">Γjtainer hidden">. The main goal is to show the existence of nonnegative solutions for the system by Schauder's fixed point theorem. Furthermore, as applications, the existence of positive solutions for some Lotka–Volterra models with cross-diffusion, self-diffusion and discontinuous coefficients are also investigated.