Hyperbolic Second Order Equations with Non-Regular Time Dependent Coefficients
Hyperbolic Second Order Equations with Non-Regular Time Dependent Coefficients
复制标题
具有非正则时变系数的双曲二阶方程
DOI:
10.1007/s00205-014-0830-1
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发表时间:
2014
影响因子:
2.5
通讯作者:
Garetto C
中科院分区:
文献类型:
--
作者:
Garetto C
In this paper we study weakly hyperbolic second order equations with time dependent irregular coefficients. This means assuming that the coefficients are less regular than Hölder. The characteristic roots are also allowed to have multiplicities. For such equations, we describe the notion of a ‘very weak solution’ adapted to the type of solutions that exist for regular coefficients. The construction is based on considering Friedrichs-type mollifiers of coefficients and corresponding classical solutions, and their quantitative behaviour in the regularising parameter. We show that even for distributional coefficients, the Cauchy problem does have a very weak solution, and that this notion leads to classical or to ultradistributional solutions under conditions when such solutions also exist. In concrete applications, the dependence on the regularising parameter can be traced explicitly.
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影响因子:
1.3
作者:
Garetto C
通讯作者:
Garetto C
DOI:
--
发表时间:
2010
期刊:
影响因子:
--
作者:
T. Toizumi;J. Kataoka;N. Kawai;ほか;落合啓之;Atsushi Nakayashiki;玉川安騎男;西谷達雄
通讯作者:
西谷達雄
DOI:
--
发表时间:
1991
期刊:
影响因子:
--
作者:
F. Lafon;M. Oberguggenberger
通讯作者:
M. Oberguggenberger
DOI:
--
发表时间:
2012
期刊:
影响因子:
--
作者:
F. Colombini;N. Orrú;L. Pernazza
通讯作者:
L. Pernazza
DOI:
--
发表时间:
1976
期刊:
影响因子:
--
作者:
M. Bronshtein
通讯作者:
M. Bronshtein