Geometry of Universal Magnification Invariants
Mathematical Physics
2015-05-13 v1 Cosmology and Nongalactic Astrophysics
General Relativity and Quantum Cosmology
math.MP
Abstract
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.
Keywords
Cite
@article{arxiv.0904.0630,
title = {Geometry of Universal Magnification Invariants},
author = {M. C. Werner},
journal= {arXiv preprint arXiv:0904.0630},
year = {2015}
}
Comments
RevTEX4, 13 pages, submitted to J. Math. Phys