9.8k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Bulgarian Academy of SciencesBG377 papers
- Czech Academy of Sciences, Institute of MathematicsCZ134 papers
- Sofia University "St. Kliment Ohridski"BG101 papers
- University of TübingenDE49 papers
- Centre National de la Recherche ScientifiqueFR45 papers
- Institute for Nuclear Research and Nuclear EnergyBG36 papers
- University of PisaIT34 papers
- Pennsylvania State UniversityUS30 papers
- Université Paris CitéFR30 papers
- Sapienza University of RomeIT28 papers
- Leibniz University HannoverDE26 papers
- National Tsing Hua UniversityTW26 papers
29 papers · 1 filter
Neutron star solutions with curvature induced scalarization in the extended Gauss-Bonnet scalar-tensor theories
Daniela D. Doneva, Stoytcho S. Yazadjiev
In the present paper we study models of neutron stars in a class of extended scalar-tensor Gauss-Bonnet (ESTGB) theories for which the scalar degree of freedom is exited only in th…
New Gauss-Bonnet black holes with curvature induced scalarization in the extended scalar-tensor theories
Daniela D. Doneva, Stoytcho S. Yazadjiev
In the present paper we consider a class of extended scalar-tensor-Gauss-Bonnet (ESTGB) theories for which the scalar degree of freedom is excited only in the extreme curvature reg…
Pseudo-Hermitian Reduction of a Generalized Heisenberg Ferromagnet Equation. II. Special Solutions
T. I. Valchev, A. B. Yanovski
This paper is a continuation of our previous work in which we studied a sl(3) Zakharov-Shabat type auxiliary linear problem with reductions of Mikhailov type and the integrable hie…
Uniqueness theorem for static phantom wormholes in Einstein-Maxwell-dilaton theory
Boian Lazov, Petya Nedkova, Stoytcho Yazadjiev
We prove a uniqueness theorem for traversable wormhole solutions in the Einstein-Maxwell-dilaton gravity with a phantom scalar field and a possible phantom electromagnetic field. I…
GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
The LIGO Scientific Collaboration, The Virgo Collaboration
On August 17, 2017 at 12:41:04 UTC the Advanced LIGO and Advanced Virgo gravitational-wave detectors made their first observation of a binary neutron star inspiral. The signal, GW1…
GW170814: A Three-Detector Observation of Gravitational Waves from a Binary Black Hole Coalescence
The LIGO Scientific Collaboration, the Virgo Collaboration, B. P. Abbott +1107
On August 14, 2017 at 10:30:43 UTC, the Advanced Virgo detector and the two Advanced LIGO detectors coherently observed a transient gravitational-wave signal produced by the coales…
Quantised relativistic membranes and non-perturbative checks of gauge/gravity duality
Veselin G. Filev, Denjoe O'Connor
We test the background geometry of the BFSS model using a D4-brane probe. This proves a sensitive test of the geometry and we find excellent agreement with the D4-brane predictions…
First narrow-band search for continuous gravitational waves from known pulsars in advanced detector data
The LIGO Scientific Collaboration, the Virgo Collaboration, B. P. Abbott +1096
Spinning neutron stars asymmetric with respect to their rotation axis are potential sources of continuous gravitational waves for ground-based interferometric detectors. In the cas…
Pseudo-Hermitian Reduction of a Generalized Heisenberg Ferromagnet Equation. I. Auxiliary System and Fundamental Properties
A. B. Yanovski, T. I. Valchev
We consider an auxiliary spectral problem originally introduced by Gerdjikov, Mikhailov and Valchev (GMV system) and its modification called pseudo-Hermitian reduction which is ext…
Behavior of the squeezing function near h-extendible boundary points
Nikolai Nikolov
It is shown that if the squeezing function tends to one at an h-extendible boundary point of a -smooth, bounded pseudoconvex domain, then the point is strictly p…
Space-Time Petrov-Galerkin FEM for Fractional Diffusion Problems
Beiping Duan, Bangti Jin, Raytcho Lazarov +2
We present and analyze a space-time Petrov-Galerkin finite element method for a time-fractional diffusion equation involving a Riemann-Liouville fractional derivative of order $α\i…
First low-frequency Einstein@Home all-sky search for continuous gravitational waves in Advanced LIGO data
The LIGO Scientific Collaboration, the Virgo Collaboration, B. P. Abbott +1039
We report results of a deep all-sky search for periodic gravitational waves from isolated neutron stars in data from the first Advanced LIGO observing run. This search investigates…
Subordination approach to multi-term time-fractional diffusion-wave equations
Emilia Bazhlekova, Ivan Bazhlekov
This paper is concerned with the fractional evolution equation with a discrete distribution of Caputo time-derivatives such that the largest and the smallest orders, and ,…
Determination of Boltzmann constant by equipartition theorem for capacitors
T. M. Mishonov, V. N. Gourev, I. M. Dimitrova +4
A new experimental set-up for Boltzmann constant measurement is described. Statistically averaged square of voltage is measured for different capacitances . B…
Intertwining, Excursion Theory and Krein Theory of Strings for Non-self-adjoint Markov Semigroups
Pierre Patie, Mladen Savov, Yixuan Zhao
In this paper, we start by showing that the intertwining relationship between two minimal Markov semigroups acting on Hilbert spaces implies that any recurrent extensions, in the s…
New stabilized discretizations for poroelasticity and the Stokes' equations
Carmen Rodrigo, Xiaozhe Hu, Peter Ohm +3
In this work, we consider the popular P1-RT0-P0 discretization of the three-field formulation of Biot's consolidation problem. Since this finite-element formulation does not satisf…
Noetherianity and Specht problem for varieties of bicommutative algebras
Vesselin Drensky, Bekzat K. Zhakhayev
Nonassociative algebras satisfying the polynomial identities x(yz)=y(xz) and (xy)z=(xz)y are called bicommutative. We prove the following results: (i) Finitely generated bicommutat…
Semistability, modular lattices, and iterated logarithms
Fabian Haiden, Ludmil Katzarkov, Maxim Kontsevich +1
We provide a complete description of the asymptotics of the gradient flow on the space of metrics on any semistable quiver representation. This involves a recursive construction of…
Meridian Surfaces on Rotational Hypersurfaces with Lightlike Axis in
Velichka Milousheva
We construct a special class of Lorentz surfaces in the pseudo-Euclidean 4-space with neutral metric which are one-parameter systems of meridians of rotational hypersurfaces with l…
Strongly extreme points and approximation properties
Trond A. Abrahamsen, Petr Hájek, Olav Nygaard +1
We show that if is a strongly extreme point of a bounded closed convex subset of a Banach space and the identity has a geometrically and topologically good enough local approxi…
Minimal Lorentz Surfaces in Pseudo-Euclidean 4-Space with Neutral Metric
Yana Aleksieva, Velichka Milousheva
We study minimal Lorentz surfaces in the pseudo-Euclidean 4-space with neutral metric whose first normal space is two-dimensional and whose Gauss curvature and normal curvature…
Adaptive aggregation on graphs
Wenfang Xu, Ludmil T. Zikatanov
We generalize some of the functional (hyper-circle) a posteriori estimates from finite element settings to general graphs or Hilbert space settings. We provide several theoretical…
MULTIBAT: Unified workflow for fast electrochemical 3D simulations of lithium-ion cells combining virtual stochastic microstructures, electrochemical degradation models and model order reduction
Julian Feinauer, Simon Hein, Stephan Rave +7
We present a simulation workflow for efficient investigations of the interplay between 3D lithium-ion electrode microstructures and electrochemical performance, with emphasis on li…
On nonlocal models of Kulish-Sklyanin type and generalized Fourier transforms
Vladimir S. Gerdjikov
A special class of multicomponent NLS equations, generalizing the vector NLS and related to the {\bf BD.I}-type symmetric are shown to be integrable through the inverse scattering…