文摘
This paper considers the attraction–repulsion chemotaxis system: class="mathmlsrc">class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S1468121816301109&_mathId=si1.gif&_user=111111111&_pii=S1468121816301109&_rdoc=1&_issn=14681218&md5=e9cdd5bb6211d51fec1b2435f86ff550" title="Click to view the MathML source">ut=Δu−χ∇⋅(u∇v)+ξ∇⋅(u∇w)class="mathContainer hidden">class="mathCode">, class="mathmlsrc">class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S1468121816301109&_mathId=si2.gif&_user=111111111&_pii=S1468121816301109&_rdoc=1&_issn=14681218&md5=ffb8554605c30e8741b05c3d9628a419" title="Click to view the MathML source">0=Δv+αu−βvclass="mathContainer hidden">class="mathCode">, class="mathmlsrc">class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S1468121816301109&_mathId=si3.gif&_user=111111111&_pii=S1468121816301109&_rdoc=1&_issn=14681218&md5=9135ec374a39a4c273d5903e486e207a" title="Click to view the MathML source">0=Δw+γu−δwclass="mathContainer hidden">class="mathCode">, subject to the non-flux boundary condition in a smooth bounded domain class="mathmlsrc">class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S1468121816301109&_mathId=si4.gif&_user=111111111&_pii=S1468121816301109&_rdoc=1&_issn=14681218&md5=ca4751a3cb085d0e04a3806f24b0cc44" title="Click to view the MathML source">Ω⊂R2class="mathContainer hidden">class="mathCode">, with class="mathmlsrc">class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S1468121816301109&_mathId=si5.gif&_user=111111111&_pii=S1468121816301109&_rdoc=1&_issn=14681218&md5=6fecee6be2b996f69f311a61a2983b82" title="Click to view the MathML source">χ,ξ≥0class="mathContainer hidden">class="mathCode">, class="mathmlsrc">class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S1468121816301109&_mathId=si6.gif&_user=111111111&_pii=S1468121816301109&_rdoc=1&_issn=14681218&md5=abec769d1806b0eb80617a1cdee8a6f9" title="Click to view the MathML source">α,β,γ,δ>0class="mathContainer hidden">class="mathCode">. We establish the finite time blow-up conditions for nonradial solutions that the finite time blow-up occurs at class="mathmlsrc">class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S1468121816301109&_mathId=si7.gif&_user=111111111&_pii=S1468121816301109&_rdoc=1&_issn=14681218&md5=7591bf74e3ea631e0c1d6bbdde889ca1" title="Click to view the MathML source">x0∈Ωclass="mathContainer hidden">class="mathCode"> whenever class="mathmlsrc">class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S1468121816301109&_mathId=si8.gif&_user=111111111&_pii=S1468121816301109&_rdoc=1&_issn=14681218&md5=fe7815fd945f857db081e0141b4d3ed4" title="Click to view the MathML source">∫Ωu0(x)dx>8π/(χα−ξγ)class="mathContainer hidden">class="mathCode"> with class="mathmlsrc">class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S1468121816301109&_mathId=si9.gif&_user=111111111&_pii=S1468121816301109&_rdoc=1&_issn=14681218&md5=2fdb454b8a99440d3d46a1e7a22a95b5" title="Click to view the MathML source">χα−ξγ>0class="mathContainer hidden">class="mathCode">, under class="mathmlsrc">class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S1468121816301109&_mathId=si10.gif&_user=111111111&_pii=S1468121816301109&_rdoc=1&_issn=14681218&md5=70d6e088bf9ef47b4cdd9f021edbe7e6" title="Click to view the MathML source">∫Ωu0(x)|x−x0|2dxclass="mathContainer hidden">class="mathCode"> sufficiently small. This does agree with the known blow-up conditions for radial solutions of the same model. The previous blow-up conditions for nonradial solutions are more complicated involving a classification to the sign of class="mathmlsrc">class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S1468121816301109&_mathId=si11.gif&_user=111111111&_pii=S1468121816301109&_rdoc=1&_issn=14681218&md5=c7e7994532203f7ea4f42f9ef5863450" title="Click to view the MathML source">δ−βclass="mathContainer hidden">class="mathCode">.