Topological tameness of Margulis Spacetimes
نویسندگان
چکیده
منابع مشابه
Geodesics in Margulis Spacetimes
Let M be a Margulis spacetime whose associated complete hyperbolic surface Σ has compact convex core. Generalizing the correspondence between closed geodesics on M and closed geodesics on Σ, we establish an orbit equivalence between recurrent spacelike geodesics on M and recurrent geodesics on Σ. In contrast, no timelike geodesic recurs in neither forward nor backwards time.
متن کاملDual spacetimes, Mach’s Principle and topological defects
By resolving the Riemann curvature relative to a unit timelike vector into electric and magnetic parts, we define a duality transformation which interchanges active and passive electric parts. It implies interchange of roles of Ricci and Einstein curvatures. Further by modifying the vacuum/flat equation we construct spacetimes dual to the Schwarzschild solution and flat spacetime. The dual spac...
متن کاملLynn Margulis, 1938-2011.
O n November 22, 2011, Lynn Margulis, visionary biologist and tireless champion of the microbial world, died of a massive stroke. Born in 1938, Lynn was intellectually precocious, earning her bachelor’s degree from the University of Chicago at age 18 and a Berkeley PhD 6 years later. Lynn’s enduring place in science was earned soon thereafter, with the publication of her theory of endosymbiosis...
متن کاملQuantum margulis expanders
Received (received date) Revised (revised date) We present a simple way to quantize the well-known Margulis expander map. The result is a quantum expander which acts on discrete Wigner functions in the same way the classical Margulis expander acts on probability distributions. The quantum version shares all essential properties of the classical counterpart, e.g., it has the same degree and spec...
متن کاملPropagation of vacuum polarized photons in topological black hole spacetimes
The one-loop effective action for QED in curved spacetime contains equivalence principle violating interactions between the electromagnetic field and the spacetime curvature. These interactions lead to the dependence of photon velocity on the motion and polarization directions. In this paper we investigate the gravitational analogue to the electromagnetic birefringence phenomenon in the static ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: American Journal of Mathematics
سال: 2017
ISSN: 1080-6377
DOI: 10.1353/ajm.2017.0007