一类拟线性偏微分方程不适定Cauchy问题全局收敛数值方法的Carleman权函数
Carleman weight functions for a globally convergent numerical method for ill-posed Cauchy problems for some quasilinear PDEs
摘要：
在第二作者的一系列出版物中，包括与合作者的一些出版物中，对一些非线性不适定问题构造了全局严格凸Tikhonov类泛函。这种功能的主要元素是存在的Carleman权函数。与以前的出版物相比，本文的主要新颖之处在于，正则化的解决方案（即极小）的存在性证明，而不是假设。该方法适用于不适定的柯西问题的拟线性偏微分方程的二阶和一些系数反问题。然而，为了简化演示，我们在这里只关注不适定的柯西问题。随着理论，数值结果的情况下，1-D拟线性抛物型偏微分方程的横向柯西数据上的区间（0，1）的一个边缘。
英文摘要：
In a series of publications of the second author, including some with coauthors, globally strictly convex Tikhonov-like functionals were constructed for some nonlinear ill-posed problems. The main element of such a functional is the presence of the Carleman Weight Function. Compared with previous publications, the main novelty of this paper is that the existence of the regularized solution (i.e. the minimizer) is proved rather than assumed. The method works for both ill-posed Cauchy problems for some quasilinear PDEs of the second order and for some Coefficient Inverse Problems. However, to simplify the presentation, we focus here only on ill-posed Cauchy problems. Along with the theory, numerical results are presented for the case of a 1-D quasilinear parabolic PDE with the lateral Cauchy data given on one edge of the interval (0,1).
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