Mathematics: Recent submissions
Now showing items 120 of 468

Benchmarking the performance of controllers for power grid transient stability
(Elsevier, 2019)As the energy transition transforms power grids across the globe, it poses several challenges regarding grid design and control. In particular, high levels of intermittent renewable generation complicate the task of ... 
On Index Policies for Stochastic Minsum Scheduling
(Elsevier, 2019)Minimizing the sum of completion times when scheduling jobs on identical parallel machines is a fundamental scheduling problem. Unlike the wellunderstood deterministic variant, it is a major open problem how to handle ... 
Effects of memory on spreading processes in nonMarkovian temporal networks
(Institute of Physics (IoP) and Deutsche Physikalische Gesellschaft, 2019)Many biological, social and manmade systems are better described in terms of temporal networks, i.e. networks whose links are only present at certain points in time, rather than by static ones. In particular, it has been ... 
Uniform Sampling through the Lovász Local Lemma
(Association for Computing Machinery, 2019)We propose a new algorithmic framework, called `"partial rejection sampling'', to draw samples exactly from a product distribution, conditioned on none of a number of bad events occurring. Our framework builds new connections ... 
Imbalance market real options and the valuation of storage in future energy systems
(MDPI AG, 2019)As decarbonisation progresses and conventional thermal generation gradually gives way to other technologies including intermittent renewables, there is an increasing requirement for system balancing from new and also ... 
Characterization of global fields by Dirichlet Lseries
(Springer, 20190301)We prove that two global fields are isomorphic if and only if there is an isomorphism of groups of Dirichlet characters that preserves Lseries. 
Optimal random deposition of interacting particles
(2019)Irreversible random sequential deposition of interacting particles is widely used to model aggregation phenomena in physical, chemical, and biophysical systems. We show that in one dimension the exact time dependent solution ... 
Ktheory for generalized Lamplighter groups
(American Mathematical Society, 2019)We compute Ktheory for the reduced group C*algebras of generalized Lamplighter groups 
Enhancing joint reconstruction and segmentation with nonconvex Bregman iteration
(IOP Publishing, 2019)All imaging modalities such as computed tomography (CT), emission tomography and magnetic resonance imaging (MRI) require a reconstruction approach to produce an image. A common image processing task for applications that ... 
Weighted anisotropic Hardy and Rellich type inequalities for general vector fields
(Springer Verlag, 2019)In this paper, we establish the weighted anisotropic Hardy and Rellich type inequalities with boundary terms for general (realvalued) vector fields. As consequences, we derive new as well as many of the fundamental Hardy ... 
Critical Hardy inequalities
(Academia Scientiarum Fennica, 2019)We prove a range of critical Hardy inequalities and uncertainty type principles on one of most general subclasses of nilpotent Lie groups, namely the class of homogeneous groups. Moreover, we establish a new type of critical ... 
Interpreting Galilean Invariant Vector Field Analysis via Extended Robustness
(Springer, 2019)The topological notion of robustness introduces mathematically rigorous approaches to interpret vector field data. Robustness quantifies the structural stability of critical points with respect to perturbations and has ... 
Tower of subleading dual BMS charges
(Springer Verlag (Germany), 2019)We supplement the recently found dual gravitational charges with dual charges for the whole BMS symmetry algebra. Furthermore, we extend the dual charges away from null infinity, defining subleading dual charges. These ... 
Reconstructing global fields from dynamics in the abelianized Galois group
(Springer Verlag, 2019)We study a dynamical system induced by the Artin reciprocity map for a global field. We translate the conjugacy of such dynamical systems into various arithmetical properties that are equivalent to field isomorphism, ... 
Exact solution of pulled, directed vesicles with sticky walls in two dimensions
We analyse a directed lattice vesicle model incorporating both the bindingunbinding transition and the vesicle inflationdeflation transition. From the exact solution we derive the phase diagram for this model and elucidate ... 
The HallPaige conjecture, and synchronization for affine and diagonal groups Journal of Algebra
(Elsevier, 2019)The Hall–Paige conjecture asserts that a finite group has a complete mapping if and only if its Sylow subgroups are not cyclic. The conjecture is now proved, and one aim of this paper is to document the final step in the ... 
HIGHER TOPOLOGICAL COMPLEXITY OF ASPHERICAL SPACES
(Elsevier, 2019)In this article we study the higher topological complexity TCr(X) in the case when X is an aspherical space...