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arXiv 1503.07190math.APmath.DG
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简单曲面上函数和向量场的衰减测地X射线变换的反演

Inversion of the attenuated geodesic X-ray transform over functions and vector fields on simple surfaces

François Monard

摘要:

在一类简单的有边界黎曼曲面上,我们导出了函数和向量场上衰减测地X射线变换的显式重建公式.这些公式部分地依赖于新的显式方法来构造反投影算子的连续右逆(以及全纯积分因子),这在以前是不可用的系统形式。函数的重建以两种方式提出,后者的动机是数值的考虑,并成功地实现在年底。构造上述的右逆需要某些Fredholm方程(首次出现在[Pestov-Uhlmann,IMRN 2004])是可逆的。这最后一个条件是否降低了适用性的整体方法的一个严格的子集的简单表面仍然开放,目前。

英文摘要:

We derive explicit reconstruction formulas for the attenuated geodesic X-ray transform over functions and, in the case of non-vanishing attenuation, vector fields, on a class of simple Riemannian surfaces with boundary. These formulas partly rely on new explicit approaches to construct continuous right-inverses for backprojection operators (and, in turn, holomorphic integrating factors), which were previously unavailable in a systematic form. The reconstruction of functions is presented in two ways, the latter one being motivated by numerical considerations and successfully implemented at the end. Constructing the right-inverses mentioned require that certain Fredholm equations, first appearing in [Pestov-Uhlmann, IMRN 2004], be invertible. Whether this last condition reduces the applicability of the overall approach to a strict subset of simple surfaces remains open at present.

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