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λ—阶导数与波动方程的Cauchy问题(0<λ<1)
Derivative of λ--th order and Cauchy’s Problem for Wave Equation(0<λ<1)
【摘要】 本文利用λ——阶导数(1/2<λ<1)的嵌入定理改进С.Л.索伯列夫关于n维空间波动方程Cauchy问题解的存在性定理为:如果初始数据u0∈W2([n/2]+2)Hλ(G)u1∈W2([n/2]+2)Hλ(G),(1/2<λ<1),则存在唯一古典解。
【Abstract】 Consider the Cauchy problem for the wave equation in n-dimensionalspace:(2u)/(t2)-Δu=0u|t=0=u0(u)/(t)|t=0=u1 In the paper we improve the result of S.L.Sobolev in following theo-rem Theoem: If u0∈W2([n/2]+2)Hλ(G) and u1∈W2.([n/2]+1)Hλ(G),then Cauchy’s problem possesses a solution u with continuous secondderivatives. (1/2<λ<1)
- 【文献出处】 中山大学学报(自然科学版) ,Acta Scifntiarum Naturalium Universitatis Sunyaatseni , 编辑部邮箱 ,1965年03期
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