Results 71 to 80 of about 16,119 (189)
Classics Illustrated: Limits of Spacetimes
, 2014 We carefully study the $e \rightarrow m$ and $e \rightarrow 0$ limits of the Reissner-Nordstr\"om spacetime using Geroch's definition of limits of spacetimes. This is implemented by embedding the one-parameter family of spacetimes in anti-de Sitter space,
Bengtsson, Ingemar +2 more
core +1 more source
Obstructions to homotopy invariance of loop coproduct via parameterized fixed‐point theory
Journal of Topology, Volume 19, Issue 1, March 2026.Abstract Given f:M→N$f:M \rightarrow N$ a homotopy equivalence of compact manifolds with boundary, we use a construction of Geoghegan and Nicas to define its Reidemeister trace [T]∈π1st(LN,N)$[T] \in \pi _1^{st}(\mathcal {L}N, N)$. We realize the Goresky–Hingston coproduct as a map of spectra, and show that the failure of f$f$ to entwine the spectral ...
Lea Kenigsberg, Noah Porcelli
wiley +1 more source
Z2-symmetric planar polynomial Hamiltonian systems of degree 3 with nilpotent centers
Electronic Journal of Differential Equations, 2019 We provide the normal forms of all $\mathbb{Z}_2$-symmetric planar polynomial Hamiltonian systems of degree 3 having a nilpotent center at the origin.
Fabio Scalco Dias +2 more
doaj
Synchronization theory of microwave induced zero-resistance states
, 2013 We develop the synchronization theory of microwave induced zero-resistance states (ZRS) for two-dimensional electron gas in a magnetic field. In this theory the dissipative effects lead to synchronization of cyclotron phase with driving microwave phase ...
Chepelianskii, A. D. +2 more
core +3 more sources
Piecewise deterministic quantum dynamics and quantum fractals on the Poincaré disk [PDF]
Reports on Mathematical Physics, 2004 Added Concluding Remarks, improved figure captions, updated references.
openaire +2 more sources
Dimer models and conformal structures
Communications on Pure and Applied Mathematics, Volume 79, Issue 2, Page 340-446, February 2026.Abstract Dimer models have been the focus of intense research efforts over the last years. Our paper grew out of an effort to develop new methods to study minimizers or the asymptotic height functions of general dimer models and the geometry of their frozen boundaries.
Kari Astala +3 more
wiley +1 more source
Chiellini Hamiltonian Lienard differential systems
Electronic Journal of Differential Equations, 2019 We characterize the centers of the Chiellini Hamiltonian Lienard second-order differential equations $x'=y$, $y'=-f(x) y -g(x)$ where $g(x)=f(x) (k - \alpha (1 +\alpha) \int f(x) dx )$ with $\alpha, k \in \mathbb{R}$.
Jaume Gine, Jaume Llibre, Claudia Valls
doaj
Dynamical Monte Carlo Simulations of 3-D Galactic Systems in Axisymmetric and Triaxial Potentials
, 2017 We describe the dynamical behavior of isolated old (> 1 G yr) objects-like Neutron Stars (NSs). These isolated NSs are evolved under smooth, time-independent, 3-D gravitational potentials, axisymmetric and with a triaxial dark halo.
Taani, Ali, Vallejo, Juan C.
core +1 more source
Random walk on the Poincar�� disk induced by a group of M��bius transformations
Markov processes and related fields, 2018 We consider a discrete-time random motion, Markov chain on the Poincar disk. In the basic variant of the model a particle moves along certain circular arcs within the disk, its location is determined by a composition of random M bius transformations. We exploit an isomorphism between the underlying group of M bius transformations and $\rr$ to study
McCarthy, Charles +3 more
openaire +3 more sources
Proceedings of the London Mathematical Society, Volume 132, Issue 2, February 2026.Abstract This paper investigates boundary‐layer solutions of the singular Keller–Segel system (proposed in Keller and Segel [J. Theor. Biol. 30 (1971), 377–380]) in multi‐dimensional domains, which describes cells' chemotactic movement toward the concentration gradient of the nutrient they consume, subject to a zero‐flux boundary condition for the cell
Jose A. Carrillo +3 more
wiley +1 more source