Results 11 to 20 of about 1,585 (249)
Electronic Journal of Qualitative Theory of Differential Equations, 2014 In this article we obtain the geometric classification of singularities, finite and infinite, for the three subclasses of quadratic differential systems with $m_f=4$ possessing exactly two finite singularities, namely: (i) systems with two double complex
Joan Artés +4 more
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Finite and infinite energy solutions of singular elliptic problems: Existence and uniqueness
Journal of Differential Equations, 2018 We establish existence and uniqueness of solution for the homogeneous Dirichlet problem associated to a fairly general class of elliptic equations modeled by $$ -Δu= h(u){f} \ \ \text{in}\,\ Ω, $$ where $f$ is an irregular datum, possibly a measure, and $h$ is a continuous function that may blow up at zero.
OLIVA, FRANCESCANTONIO +1 more
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Orientifolds and duality cascades: confinement before the wall
Journal of High Energy Physics, 2018 We consider D-branes at orientifold singularities and discuss two properties of the corresponding low energy four-dimensional effective theories which are not shared, generically, by other Calabi-Yau singularities.
Riccardo Argurio, Matteo Bertolini
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Dynamical Cobordism and Swampland Distance Conjectures
Journal of High Energy Physics, 2021 We consider spacetime-dependent solutions to string theory models with tadpoles for dynamical fields, arising from non-trivial scalar potentials. The solutions have necessarily finite extent in spacetime, and are capped off by boundaries at a finite ...
Ginevra Buratti +3 more
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Global Wilson–Fisher fixed points
Nuclear Physics B, 2017 The Wilson–Fisher fixed point with O(N) universality in three dimensions is studied using the renormalisation group. It is shown how a combination of analytical and numerical techniques determine global fixed points to leading order in the derivative ...
Andreas Jüttner +2 more
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Stability of Linear Continuous Singular and Discrete Descriptor Systems over Infinite and Finite Time Interval [PDF]
, 2011 1.1 Classes of systems to be considered It should be noticed that in some systems we must consider their character of dynamic and static state at the same time. Singular systems (also referred to as degenerate, descriptor, generalized, differential-algebraic systems or semi-state) are those, the dynamics of which are governed by a mixture of algebraic ...
Dragutin Lj., Tamara Nestorovi
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Exact solutions of the Einstein equations for an infinite slab with a constant energy density
Physics Letters B, 2019 We find exact static solutions of the Einstein equations in the spacetime with plane symmetry, where an infinite slab with finite thickness and homogeneous energy (mass) density is present.
Alexander Yu. Kamenshchik +1 more
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Singularities of eight- and nine-particle amplitudes from cluster algebras and tropical geometry
Journal of High Energy Physics, 2021 We further exploit the relation between tropical Grassmannians and Gr(4, n) cluster algebras in order to make and refine predictions for the singularities of scattering amplitudes in planar N $$ \mathcal{N} $$ = 4 super Yang-Mills theory at higher ...
Niklas Henke, Georgios Papathanasiou
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Prescriptive unitarity for non-planar six-particle amplitudes at two loops
Journal of High Energy Physics, 2019 We extend the applications of prescriptive unitarity beyond the planar limit to provide local, polylogarithmic, integrand-level representations of six-particle MHV scattering amplitudes in both maximally supersymmetric Yang-Mills theory and gravity.
Jacob L. Bourjaily +4 more
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Indefinite causal structures for continuous-variable systems
New Journal of Physics, 2016 In all our well-established theories, it is assumed that events are embedded in a global causal structure such that, for every pair of events, the causal order between them is always fixed.
Flaminia Giacomini +2 more
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