Results 31 to 40 of about 57,898 (302)

From rotating to charged black holes and back again

open access: yesJournal of High Energy Physics, 2022
The mild form of the Weak Gravity Conjecture (WGC) requires higher derivative corrections to extremal charged black holes to increase their charge-to-mass ratio. This allows decay via emission of a smaller extremal black hole.
Lars Aalsma, Gary Shiu
doaj   +1 more source

Extremal dynamics on complex networks: Analytic solutions [PDF]

open access: yesPhysical Review E, 2005
The Bak-Sneppen model displaying punctuated equilibria in biological evolution is studied on random complex networks. By using the rate equation and the random walk approaches, we obtain the analytic solution of the fitness threshold $x_c$ to be 1/(_f+1), where _f=/ (=) in the quenched (annealed) updating case, where is the n-th moment of the degree ...
Masuda, N., Goh, K. -I., Kahng, B.
openaire   +3 more sources

Monotone Iterative Technique for Conformable Fractional Differential Equations with Deviating Arguments

open access: yesDiscrete Dynamics in Nature and Society, 2020
This paper is concerned with the existence of extremal solutions for periodic boundary value problems for conformable fractional differential equations with deviating arguments.
Huiling Chen, Shuman Meng, Yujun Cui
doaj   +1 more source

On Extremal Limits and Duality Orbits of Stationary Black Holes [PDF]

open access: yes, 2013
With reference to the effective three-dimensional description of stationary, single center solutions to (ungauged) symmetric supergravities, we complete a previous analysis on the definition of a general geometrical mechanism for connecting global ...
Andrianopoli, Laura   +2 more
core   +1 more source

Exactly solvable gravitating perfect fluid solitons in (2 + 1) dimensions

open access: yesJournal of High Energy Physics, 2018
The Bogomolnyi-Prasad-Sommerfield (BPS) baby Skyrme model coupled to gravity is considered. We show that in an asymptotically flat space-time the model still possesses the BPS property, i.e., admits a BPS reduction to first order Bogomolnyi equations ...
C. Adam   +3 more
doaj   +1 more source

Black Hole Solutions of Kaluza-Klein Supergravity Theories and String Theory [PDF]

open access: yes, 1995
We find U(1)_{E} \times U(1)_{M} non-extremal black hole solutions of 6-dimensional Kaluza-Klein supergravity theories. Extremal solutions were found by Cveti\v{c} and Youm\cite{C-Y}. Multi black hole solutions are also presented.
Gibbons G W   +6 more
core   +2 more sources

Construction Algorithm of Given Girth Graphs Based on Quantum Evolution [PDF]

open access: yesJisuanji gongcheng, 2017
To construct an extremal graph with a given girth is still a challenging problem of graph theory.Especially when the vertex number increasex combination explosion will appear.Thus,this paper proposes an algorithm for constructing graphs with given girth ...
FENG Xiaohua,SUN Yongqi
doaj   +1 more source

Sequences of extremal radially excited rotating black holes

open access: yes, 2013
In Einstein-Maxwell-Chern-Simons theory the extremal Reissner-Nordstr\"om solution is no longer the single extremal solution with vanishing angular momentum, when the Chern-Simons coupling constant reaches a critical value.
Blazquez-Salcedo, Jose Luis   +3 more
core   +1 more source

Four-dimensional High-Branes as Intersecting D-Branes [PDF]

open access: yes, 1996
We show that a class of extremal four-dimensional supersymmetric ``high-branes'', i.e. string and domain wall solutions, can be interpreted as intersections of four ten-dimensional Dirichlet branes.
Balasubramanian   +30 more
core   +5 more sources

From static to cosmological solutions of N $$ \mathcal{N} $$ = 2 supergravity

open access: yesJournal of High Energy Physics, 2019
We obtain cosmological solutions with Kasner-like asymptotics in N $$ \mathcal{N} $$ = 2 gauged and ungauged supergravity by maximal analytic continuation of planar versions of non-extremal black hole solutions.
J. Gutowski, T. Mohaupt, G. Pope
doaj   +1 more source

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