Results 21 to 30 of about 2,653,054 (281)

Symmetry breaking boundaries II. More structures; examples [PDF]

open access: yes, 1999
Various structural properties of the space of symmetry breaking boundary conditions that preserve an orbifold subalgebra are established. To each such boundary condition we associate its automorphism type.
Fuchs, J., Schweigert, C.
core   +2 more sources

A classifying algebra for boundary conditions [PDF]

open access: yes, 1997
We introduce a finite-dimensional algebra that controls the possible boundary conditions of a conformal field theory. For theories that are obtained by modding out a Z_2 symmetry (corresponding to a so-called D_odd-type, or half-integer spin simple ...
Bantay   +10 more
core   +3 more sources

Control of lateral boundary conditions in four-dimensional variational data assimilation for a limited area model [PDF]

open access: yesTellus: Series A, Dynamic Meteorology and Oceanography, 2012
The limited area model forecasting problem is a lateral boundary condition (LBC) problem in addition to the initial condition problem. The data assimilation has traditionally been considered as a process for estimation of the initial condition only ...
Nils Gustafsson
doaj   +1 more source

Consistent boundary conditions for supergravity

open access: yes, 2005
We derive the complete orbit of boundary conditions for supergravity models which is closed under the action of all local symmetries of these models, and which eliminates spurious field equations on the boundary. We show that the Gibbons-Hawking boundary
van Nieuwenhuizen, P.   +1 more
core   +3 more sources

New boundary conditions for AdS2

open access: yesJournal of High Energy Physics, 2020
We describe new boundary conditions for AdS2 in Jackiw-Teitelboim gravity. The asymptotic symmetry group is enhanced to Diff(S 1) ⋉ C ∞(S 1) whose breaking to SL(2, ℝ) × U(1) controls the near-AdS2 dynamics. The action reduces to a boundary term which is
Victor Godet, Charles Marteau
doaj   +1 more source

On a fractional q-differential inclusion on a time scale via endpoints and numerical calculations

open access: yesAdvances in Difference Equations, 2020
By using an endpoint result for set-valued maps, we study the existence of solutions for a fractional q-differential inclusion with sum and integral boundary value conditions on the time scale T t 0 = { t 0 q , t 0 q 2 , … } ∪ { 0 } $\mathbb{T}_{t_{0}}= \
Mohammad Esmael Samei, Shahram Rezapour
doaj   +1 more source

Scalar Boundary Conditions in Lifshitz Spacetimes [PDF]

open access: yes, 2013
We investigate the conditions imposable on a scalar field at the boundary of the so- called Lifshitz spacetime which has been proposed as the dual to Lifshitz field theories.
Keeler, Cynthia
core   +2 more sources

The Third Mixed Boundary-Value Problem for Strongly Elliptic Differential-Difference Equations in a Bounded Domain

open access: yesСовременная математика: Фундаментальные направления
We consider strongly elliptic differential-difference equations with mixed boundary conditions in a bounded domain. There are homogeneous Dirichlet conditions on a part of the boundary, and boundary conditions of the third kind on the other part of the ...
V. V. Akhlynina
doaj   +1 more source

Molecular bases of circadian magnesium rhythms across eukaryotes

open access: yesFEBS Letters, EarlyView.
Circadian rhythms in intracellular [Mg2+] exist across eukaryotic kingdoms. Central roles for Mg2+ in metabolism suggest that Mg2+ rhythms could regulate daily cellular energy and metabolism. In this Perspective paper, we propose that ancestral prokaryotic transport proteins could be responsible for mediating Mg2+ rhythms and posit a feedback model ...
Helen K. Feord, Gerben van Ooijen
wiley   +1 more source

Menagerie of AdS2 boundary conditions

open access: yesJournal of High Energy Physics, 2017
We consider different sets of AdS2 boundary conditions for the Jackiw-Teitelboim model in the linear dilaton sector where the dilaton is allowed to fluctuate to leading order at the boundary of the Poincaré disk.
Daniel Grumiller   +4 more
doaj   +1 more source

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