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10 papers · 1 filter
A Bott-Borel-Weil theorem for diagonal ind-groups
Ivan Dimitrov, Ivan Penkov
We establish a theorem computing the cohomology groups of line bundles on homogeneous ind-varieties for diagonal ind-groups . The main difficulty in proving this analog of…
Self-Regulation of AGN in Galaxy Clusters
M. Brueggen, E. Scannapieco
Cool cores of galaxy clusters are thought to be heated by low-power active galactic nuclei (AGN), whose accretion is regulated by feedback. However, the interaction between the hot…
Design of Learning Based MIMO Cognitive Radio Systems
Feifei Gao, Rui Zhang, Ying-Chang Liang +1
This paper addresses the design issues of the multi-antenna-based cognitive radio (CR) system that is able to operate concurrently with the licensed primary radio (PR) system. We p…
Infinite dimensional restricted invertibility
Peter G. Casazza, Goetz E. Pfander
The 1987 Bourgain-Tzafriri Restricted Invertibility Theorem is one of the most celebrated theorems in analysis. At the time of their work, the authors raised the question of a poss…
Cosmic strings interacting with dark strings
Betti Hartmann, Farhad Arbabzadah
Motivated by astrophysical observations of excess electronic production in the galaxy, new theoretical models of the dark matter sector have been proposed in which the Standard mod…
Nanomechanical Detection of Itinerant Electron Spin Flip
Guiti Zolfagharkhani, Alexei Gaidarzhy, Pascal Degiovanni +3
Spin is an intrinsically quantum property, characterized by angular momentum. A change in the spin state is equivalent to a change in the angular momentum or mechanical torque. Thi…