53 citations · 62 across the 2 of their papers we have counts for
2 papers
gr-qc2007★ 53 cited
Magnification relations for Kerr lensing and testing Cosmic Censorship
M. C. Werner, A. O. Petters
A Kerr black hole with mass parameter m and angular momentum parameter a acting as a gravitational lens gives rise to two images in the weak field limit. We study the corresponding…
math-ph2007★ 9 cited
A Lefschetz fixed point theorem in gravitational lensing
Marcus C. Werner
Topological invariants play an important rôle in the theory of gravitational lensing by constraining the image number. Furthermore, it is known that, for certain lens models, the i…