文摘
Dissipative hyperbolic systems of regularity-loss have been recently received increasing attention. Extra higher regularity is usually assumed to obtain the optimal decay estimates, in comparison with the global-in-time existence of solutions. In this paper, we develop a new frequency-localization time-decay property, which enables us to overcome the technical difficulty and improve the minimal decay-regularity for dissipative systems. As an application, it is shown that the optimal decay rate of n id="mmlsi1" class="mathmlsrc">n class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0022247X16305613&_mathId=si1.gif&_user=111111111&_pii=S0022247X16305613&_rdoc=1&_issn=0022247X&md5=780c580b85a8b2f983c05d8d4440cc1e" title="Click to view the MathML source">L1(R3)n>n class="mathContainer hidden">n class="mathCode">n>n>n>–n id="mmlsi2" class="mathmlsrc">n class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0022247X16305613&_mathId=si2.gif&_user=111111111&_pii=S0022247X16305613&_rdoc=1&_issn=0022247X&md5=7ac44e479b9d7716d576a05e4d85af5c" title="Click to view the MathML source">L2(R3)n>n class="mathContainer hidden">n class="mathCode">n>n>n> is available for Euler–Maxwell equations with the critical regularity n id="mmlsi3" class="mathmlsrc">n class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0022247X16305613&_mathId=si3.gif&_user=111111111&_pii=S0022247X16305613&_rdoc=1&_issn=0022247X&md5=e90ddd0a7e6ec6a2a25bc19e24edcdf8" title="Click to view the MathML source">sc=5/2n>n class="mathContainer hidden">n class="mathCode">n>n>n>, that is, the extra higher regularity is not necessary.