Results 11 to 20 of about 61,340 (312)
Nonexistence of invariant measures [PDF]
Proceedings of the American Mathematical Society, 1983 Let G G be a group acting on a set X X . Suppose that for some positive integer r r , G G contains a free group F F of rank > r > r and the intersection of any stabilizer with F F has rank ⩽
David Promislow
openalex +3 more sources
Nonexistence of asymptotic observables [PDF]
Proceedings of the American Mathematical Society, 1972 Strong asymptotic limits of all Heisenberg observables exist only for trivial Hamiltonians.
James S. Howland
openalex +3 more sources
Nonexistence of Subcritical Solitary Waves [PDF]
Archive for Rational Mechanics and Analysis, 2021 AbstractWe prove the nonexistence of two-dimensional solitary gravity water waves with subcritical wave speeds and an arbitrary distribution of vorticity. This is a longstanding open problem, and even in the irrotational case there are only partial results relying on sign conditions or smallness assumptions.
Vladimir Kozlov +2 more
openaire +5 more sources
On the nonexistence of a vacuum black lens [PDF]
Journal of High Energy Physics, 2021 Abstract We demonstrate that five-dimensional, asymptotically flat, stationary and bi-axisymmetric, vacuum black holes with lens space L(n, 1) topology, possessing the simplest rod structure, do not exist. In particular, we show that the general solution on the axes and horizon, which we recently constructed by exploiting the ...
Lucietti, James, Tomlinson, Fred
openaire +6 more sources
Novel Beings and Assisted Nonexistence [PDF]
Cambridge Quarterly of Healthcare Ethics, 2021 AbstractThis article engages with the legal regulation of end-of-existence decisionmaking for novel beings, specifically assisted nonexistence for such entities. The author explains the concept of a legal model for assisted death by reference to the substantive features of legal regimes in three jurisdictions in which assisted suicide or euthanasia is ...
openaire +4 more sources
A Time-Fractional Schrödinger Equation with Singular Potentials on the Boundary
Fractal and Fractional, 2023 A Schrödinger equation with a time-fractional derivative, posed in (0,∞)×I, where I=]a,b], is investigated in this paper. The equation involves a singular Hardy potential of the form λ(x−a)2, where the parameter λ belongs to a certain range, and a ...
Ibtehal Alazman +2 more
doaj +1 more source
Nonexistence of D(4)-quintuples [PDF]
Journal of Number Theory, 2019 In this paper we prove a conjecture that $D(4)$-quintuple does not exist using both classical and new methods. Also, we give a new version of the Rickert's theorem that can be applied on some $D(4)$-quadruples.
Marija Bliznac Trebješanin +1 more
openaire +5 more sources
On the nonexistence of degenerate phase-shift discrete solitons in a dNLS nonlocal lattice [PDF]
, 2018 We consider a one-dimensional discrete nonlinear Schr{\"o}dinger (dNLS) model featuring interactions beyond nearest neighbors. We are interested in the existence (or nonexistence) of phase-shift discrete solitons, which correspond to four-sites vortex ...
Kevrekidis, P. G. +4 more
core +2 more sources
Sharp Contradiction for Local-Hidden-State Model in Quantum Steering [PDF]
, 2016 In quantum theory, no-go theorems are important as they rule out the existence of a particular physical model under consideration. For instance, the Greenberger-Horne-Zeilinger (GHZ) theorem serves as a no-go theorem for the nonexistence of local hidden ...
Chen, Jing-Ling +3 more
core +2 more sources
Nonlinear Schr\"odinger equation in the Bopp-Podolsky electrodynamics: solutions in the electrostatic case [PDF]
, 2018 We study the following nonlinear Schr\"odinger-Bopp-Podolsky system \[ \begin{cases} -\Delta u + \omega u + q^{2}\phi u = |u|^{p-2}u -\Delta \phi + a^2 \Delta^2 \phi = 4\pi u^2 \end{cases} \hbox{ in }\mathbb{R}^3 \] with $a,\omega>0$.
d'Avenia, Pietro, Siciliano, Gaetano
core +2 more sources