A bstract We use the replica method to compute entanglement entropy of a universe without gravity entangled in thermofield-double-like state with disjoint gravitating universe. Including wormholes between replicas latter gives an functional which includes “island” on solve back-reaction equations when cosmological constant is negative show that this island coincides causal shadow region created...

Over time the concept of hypercyclicity has been explored in different manners and contexts, gaining new forms applications. In particular when space an adjacent structure, we can always look for sets hypercyclic vectors compatible with that framework. this paper deal operators acting on Fréchet sequence algebras give criteria existence common disjoint algebras.

The high-level contribution of this paper is a simulation-based analysis to evaluate the tradeoffs between lifetime and hop count of link-disjoint, node-disjoint and zone-disjoint multi-path routes vis-à-vis singlepath minimum hop routes for mobile ad hoc networks. The link-disjoint, node-disjoint and zone-disjoint algorithms proposed in this paper can be used to arrive at benchmarks for the ti...