In this paper, we study the multiplicity of so
lu tions with a prescribed
mathmlsrc">mathImg" data-ma thURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S1468121816300426&_ma thId=si2.gif&_user=111111111&_pii=S1468121816300426&_rdoc=1&_issn=14681218&md5=1caf88f83c5880c73b6bc703f9054989" title="Click to view the MathML source">L2 mathContainer hidden">mathCode"><ma th altimg="si2.gif" overflow="scroll">L 2 ma th> -norm for a class of nonlinear Kirchhoff type problems in
mathmlsrc">mathImg" data-ma thURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S1468121816300426&_ma thId=si1.gif&_user=111111111&_pii=S1468121816300426&_rdoc=1&_issn=14681218&md5=f422250ef231f81c944b726d55320ed5" title="Click to view the MathML source">R3 mathContainer hidden">mathCode"><ma th altimg="si1.gif" overflow="scroll">mathvariant="double-struck">R 3 ma th> where
mathmlsrc">mathImg" data-ma thURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S1468121816300426&_ma thId=si5.gif&_user=111111111&_pii=S1468121816300426&_rdoc=1&_issn=14681218&md5=db7ac37e9904d328e45401ae0c07e2e9" title="Click to view the MathML source">a,b>0 mathContainer hidden">mathCode"><ma th altimg="si5.gif" overflow="scroll">a , b > 0 ma th> are constants,
mathmlsrc">mathImg" data-ma thURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S1468121816300426&_ma thId=si6.gif&_user=111111111&_pii=S1468121816300426&_rdoc=1&_issn=14681218&md5=2c7ad0de709cc6768e320c52d429d6cc" title="Click to view the MathML source">λ∈R mathContainer hidden">mathCode"><ma th altimg="si6.gif" overflow="scroll">λ ∈ mathvariant="double-struck">R ma th> ,
mathmlsrc">mathImg" data-ma thURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S1468121816300426&_ma thId=si7.gif&_user=111111111&_pii=S1468121816300426&_rdoc=1&_issn=14681218&md5=df7c982323f2d2dc5466f94a6d05eb3b"> mage" height="18" width="65" alt="View the MathML source" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S1468121816300426-si7.gif"> mage/1-s2.0-S1468121816300426-si7.gif"> mathContainer hidden">mathCode"><ma th altimg="si7.gif" overflow="scroll">p ∈ ( 14 3 , 6 ) ma th> . To get such so
lu tions we look for critical points of the energy functional
restricted on the following set
For the va
lu e
mathmlsrc">mathImg" data-ma thURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S1468121816300426&_ma thId=si7.gif&_user=111111111&_pii=S1468121816300426&_rdoc=1&_issn=14681218&md5=df7c982323f2d2dc5466f94a6d05eb3b"> mage" height="18" width="65" alt="View the MathML source" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S1468121816300426-si7.gif"> mage/1-s2.0-S1468121816300426-si7.gif"> mathContainer hidden">mathCode"><ma th altimg="si7.gif" overflow="scroll">p ∈ ( 14 3 , 6 ) ma th> considered, the functional
mathmlsrc">mathImg" data-ma thURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S1468121816300426&_ma thId=si11.gif&_user=111111111&_pii=S1468121816300426&_rdoc=1&_issn=14681218&md5=6803f172632cd0bcfcab95982c9ca516" title="Click to view the MathML source">Ib mathContainer hidden">mathCode"><ma th altimg="si11.gif" overflow="scroll">I b ma th> is unbounded from below on
mathmlsrc">mathImg" data-ma thURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S1468121816300426&_ma thId=si12.gif&_user=111111111&_pii=S1468121816300426&_rdoc=1&_issn=14681218&md5=ccb37ca46a6497cf409725027032c333" title="Click to view the MathML source">Sr (c) mathContainer hidden">mathCode"><ma th altimg="si12.gif" overflow="scroll">S r ( c ) ma th> . By using a mini
ma x procedure, we prove that for any
mathmlsrc">mathImg" data-ma thURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S1468121816300426&_ma thId=si13.gif&_user=111111111&_pii=S1468121816300426&_rdoc=1&_issn=14681218&md5=3548ef44eb8a13c8b834e15e82f42b5e" title="Click to view the MathML source">c>0 mathContainer hidden">mathCode"><ma th altimg="si13.gif" overflow="scroll">c > 0 ma th> , there are infinitely
ma ny critical points
mathmlsrc">mathImg" data-ma thURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S1468121816300426&_ma thId=si14.gif&_user=111111111&_pii=S1468121816300426&_rdoc=1&_issn=14681218&md5=aeddda1f499107f8ff5e837cb62a1196"> mage" height="20" width="55" alt="View the MathML source" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S1468121816300426-si14.gif"> mage/1-s2.0-S1468121816300426-si14.gif"> mathContainer hidden">mathCode"><ma th altimg="si14.gif" overflow="scroll">{ u n b } n ∈ mathvariant="double-struck">N + ma th> of
mathmlsrc">mathImg" data-ma thURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S1468121816300426&_ma thId=si11.gif&_user=111111111&_pii=S1468121816300426&_rdoc=1&_issn=14681218&md5=6803f172632cd0bcfcab95982c9ca516" title="Click to view the MathML source">Ib mathContainer hidden">mathCode"><ma th altimg="si11.gif" overflow="scroll">I b ma th> restricted on
mathmlsrc">mathImg" data-ma thURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S1468121816300426&_ma thId=si12.gif&_user=111111111&_pii=S1468121816300426&_rdoc=1&_issn=14681218&md5=ccb37ca46a6497cf409725027032c333" title="Click to view the MathML source">Sr (c) mathContainer hidden">mathCode"><ma th altimg="si12.gif" overflow="scroll">S r ( c ) ma th> with the energy
mathmlsrc">mathImg" data-ma thURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S1468121816300426&_ma thId=si17.gif&_user=111111111&_pii=S1468121816300426&_rdoc=1&_issn=14681218&md5=7555999291cb723ef0d16f1aa199f86b"> mage" height="17" width="151" alt="View the MathML source" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S1468121816300426-si17.gif"> mage/1-s2.0-S1468121816300426-si17.gif"> mathContainer hidden">mathCode"><ma th altimg="si17.gif" overflow="scroll">I b ( u n b ) → + ∞ ( n → + ∞ ) ma th> . Moreover, we regard
mathmlsrc">mathImg" data-ma thURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S1468121816300426&_ma thId=si18.gif&_user=111111111&_pii=S1468121816300426&_rdoc=1&_issn=14681218&md5=f90c00699f75351cdd4351ecae1c9008" title="Click to view the MathML source">b mathContainer hidden">mathCode"><ma th altimg="si18.gif" overflow="scroll">b ma th> as a parameter and give a convergence property of
mathmlsrc">mathImg" data-ma thURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S1468121816300426&_ma thId=si19.gif&_user=111111111&_pii=S1468121816300426&_rdoc=1&_issn=14681218&md5=fd4c1dafbc076796d38071d97538b492"> mage" height="17" width="15" alt="View the MathML source" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S1468121816300426-si19.gif"> mage/1-s2.0-S1468121816300426-si19.gif"> mathContainer hidden">mathCode"><ma th altimg="si19.gif" overflow="scroll">u n b ma th> as
mathmlsrc">mathImg" data-ma thURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S1468121816300426&_ma thId=si20.gif&_user=111111111&_pii=S1468121816300426&_rdoc=1&_issn=14681218&md5=db06fb7b029d449b15bed5cbdc052e06" title="Click to view the MathML source">b→0+ mathContainer hidden">mathCode"><ma th altimg="si20.gif" overflow="scroll">b → 0 + ma th> .