arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0904.0630math-phastro-ph.COgr-qcmath.MP
收藏

万有放大不变量的几何

Geometry of Universal Magnification Invariants

M. C. Werner

摘要:

最近在引力透镜和灾变理论方面的工作表明,在褶皱、尖点和更高的灾变附近的图像的符号放大率之和为零。在这里,它是讨论如何莱夫谢茨不动点理论可以用来解释这个结果的几何。它示出的一般情况下,以及椭圆和双曲脐在引力透镜。

英文摘要:

Recent work in gravitational lensing and catastrophe theory has shown that the sum of the signed magnifications of images near folds, cusps and also higher catastrophes is zero. Here, it is discussed how Lefschetz fixed point theory can be used to interpret this result geometrically. It is shown for the generic case as well as for elliptic and hyperbolic umbilics in gravitational lensing.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑